Part of the problem may be the word "opportunity"--I think it encourages people to think about what else they'd *do* with the money, and that's a bit of a distraction.
Perhaps a better term is the
time-value of money. Put simply, the value of "$1" isn't constant: over time, the purchasing power of $1 goes down, because the prices of things go up. But, it's also the case that, for most of us, the
importance of $1 goes down, because we also get raises, promotions, or even better jobs in the meantime; we can expect to earn a little more each year. The simplest way to think about it is that a fixed sum of money becomes less valuable over time.
The next idea is the difference between
present value and
future value. Because money loses "value" over time, $1 payments you make in the future "cost less" (in terms of
value or
worth) than the same $1 payment made today. Conversely, $1 payments in the present "cost more" than the same $1 payment made in the future. How much less (or more) is a bit of a question, because the
rate R at which the value changes is not necessarily known with certainty. There are a couple of options people tend to use for R--long-run rate of inflation is one (somewhere in the 2-4% range--the
Fed target is 2%, the
observed rate from 1960 to 2021 is 3.8%). Another is what one might expect to earn (after taxes) over the long run with unspent cash that is put in some reasonable investment.
For government bonds, the pre-tax rate is 5-6%. For large-cap stocks, the pre-tax rate is 10%. Reasonable after-tax rates might range anywhere from 3-8%.
These ideas collectively give you the ability to compare the "cost" (not the "price") of two different hypothetical alternatives.
- Buying a 2042 resort. You spend $B to buy it, and then each year y spend $Dy in dues. You use it for 19 years on some set of DVC nights that use all of the points exactly, after which the contract expires.
- Renting as you go. Invest $B in an investment account expected to grow at the long-term after-tax rate of R (the one we used above). At the beginning of every year, add $Dy to that. Then pay for exactly the same set of DVC nights out of this account by renting them from an owner/from Disney/whatever.
If the investment account in Option 2 still has money in it when the 2042 resorts expire, then renting is cheaper than buying. If you run out of money in the investment account before then, then buying would be cheaper than renting.
It doesn't really matter whether or not one is actually considering only these two options with the money; this is just a thought exercise to compare the cost of buying DVC to renting, given a plan to stay in DVC resorts for some number of nights over the horizon of the deed.
Lots of people have done this, with varying levels of sophistication. They might choose different numbers for R. They might disagree on how much dues will change over the life of the contract, or what the rental rates will be and how they will change. But, they all tend to agree on a few things: First, very few of them believe that a direct purchase of the 2042 resorts will cost less than just renting the same stays. Second, most of them think that a resale purchase of a 2042 resort might come pretty close to the cost of renting--it might be a little more, or a little less, but the difference is not particularly large either way. In other words: you probably won't "save (much) money" by buying a 2042 resort, even resale.
MouseSavers has a spreadsheet that's a pretty good starting point if you want to play with this yourself.
That isn't the same thing as "you should never buy a 2042 resort" or even "you should never buy a 2042 resort direct." There may be lots of reasons that have nothing to do with "what it costs" for someone to prefer buying or renting. For example, I might know that my income is expected to grow significantly over the next 20 years, so renting makes more sense even if buying would be cheaper in the long run. Alternatively, I might hate with a white-hot passion the process of finding a point rental and negotiating it, and so I'd rather buy than rent, even if it costs a little more. In fact, I might even lose sleep at night over the fact that I'm not a "real" DVC Member and that I can't use my points for a
DCL cruise, and so I'm willing to buy my favorite resort direct even if it costs (much) more to do it that way. Heck, I might even know myself well enough to know that if I didn't take this $30,000 and buy DVC with it that I'd just fritter it away on meaningless junk. (Guilty as charged, your honor.)
After all, money is for spending, and if that's what someone wants to spend it on, so be it. And that's why reasonable people can still make different decisions about buying (or not buying) at these resorts. But, an informed buyer who understands opportunity cost will probably not consider "it is cheaper than renting" to be a compelling reason to buy a 2042 resort.
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As a grumpy-old-man aside: I find it criminal that high schools do not teach their graduates some of these basic economic principles, let alone that it is perfectly possible to have a college degree without seeing them. Yes, they require a little bit of math, but most high school graduates should be able to get their heads around compound interest, and that's all this is. \shakes-fist
I probably didn't learn these ideas until I took an
Engineering Economics course as an undergraduate. Looking back over the 30 years since I graduated, that is easily the most valuable course I took at Berkeley. For example, when I bought my first house, it helped me decide whether or not I should pay points to reduce my interest rate (in that case, no), whether we should maximize our SEP contributions in our Schedule C businesses (yes), what we needed to put aside in our kids' 529 plans to make sure they had their college expenses covered without needing to borrow later, etc. etc. etc.
On the other hand, timeshare sales agents have an advantage when talking with a prospect who doesn't understand these ideas. That's because the usual sales pitch includes taking the purchase price and dividing it by the number of years you'd expect to use it for vacation, and using that as the "annual cost" of what you are buying. That
significantly under-values the purchase price, and makes it look like the cost is much lower than it "really" is. Then the agent compares that to rack-rate rents, valuing future costs at present values, which over-values renting. The comparison looks fantastically good for the buyer.
The only problem with it is that the case for buying is exaggerated at best, and in some cases buying might cost the consumer more.
My brother has an MBA from a top-20 B-school. He knows his way around a financial analysis. He once attended a timeshare sales pitch in which the agent pulled exactly this trick. "Hold on a second," my brother said, "you are ignoring the time value of money. If you add that in, how does that change things?" The agent said he didn't have that off the top of his head but would ask the senior agent to go over it. The senior agent (really, the "closer" who was already supposed to talk to them) came in, and
did exactly the same thing that the first agent did.
At that point, my brother looked at the agent and said: "Either you don't understand finance, or you think I don't. This meeting is over," and that was the end of that. It's too bad, really, because he was a great candidates for a timeshare, even from the developer (in this case, Hilton). A better-informed sales staff probably could have sold him on it. Que sera.