My kids are at the age where the adults in my life are financing college. Most assumed that their kids would get far more grant money and aid than they did. Many assumed that scholarships would be qualified for and won. Many assumed that their kid would go to a state school - only to have them fall in love with an out of state or private school and then find themselves unable to reign in their 18 year old dreams.
Most of them regret emotional decisions now made that meant they didn't save for college. Sunroofs on cars. Vacations. Designer purses.
When you make an emotional financial decision (or any financial decision really) you have to decide if the emotional benefit now is with whatever you give up later - opportunity cost.
So you might take your family to Disney now, and be giving up getting your kids through college without debt. Or traveling in your own retirement.
Me, I'm a compromise person. I think that its perfectly reasonable for middle class folks to get their kids to Disney. But it doesn't need to be every year and it can be done much cheaper than DVC or the Poly. AND be able to get your kids through college with minimal debt. AND be able to travel a bit in retirement - although it might not be the entire Winter in San Diego. But in order to do those things, money is too tight to pay it where you don't need to pay it - unless you make more than we do. For us, that's meant paying very little interest - but getting paid a lot in interest and dividends. Its meant not necessarily booking the room on the beach in Hawaii - but we did get to go to Hawaii - we just had to look at a parking lot and had a long layover to make it more affordable. My husband has a nice car - but we pay cash for it - he can't buy it until the car fund permits it - and its used - never new. I drive a practical car that gets me where I go.
I don't know how old you are, or how old your kids are - mine are in high school and I'm almost 50. Neither my husband and I want to work until social security kicks in - we are feeling done. I didn't realize this version of Senioritis would hit so young....but it has. And thus we adjust - but because we've made good financial decisions not merely emotionally based for years - we have SOME flexibility with this one, which is both emotional and financial - and which involved me taking a sabbatical and my husband starting a consulting company in the past two years. At the same time, the kids being high school age has involved expenses I heard of...but weren't really real until now - $2000 worth of Spring Break trips - my daughter and the band/choir/drama groups to NYC, my son to Florida for baseball camp with the team. Booster "donations" that might as well be fees. Drivers ed and INSURANCE!
And we didn't get to the point of looking at fifty and having a realistic semi retirement until 68 by living like poor hermits - as I said, we went to Hawaii. My daughter and I have been to Europe twice (my son and husband once, my son wanted to be home for baseball for the second trip). Three Disney cruises. Camp for the kids. That nice (but used) car. It isn't that we don't emotionally spend - we just make sure we are spending wisely and only what we feel we can afford to spend and continue to meet most of our financial goals - and definitely the ones we think are important.
Now, it may be that when you write down your life goals that involve money - annual Disney trips are the most important thing to you and your family. In which case, DVC is perfect, and financing to get in as soon as possible is probably not a bad idea. But if that is the case, we don't share enough values to even have a meaningful conversation. For us, vacation has come below retirement, college, financial security through a year job loss, living a comfortable day to day life that includes dinners out and treating friends to pizza, good bourbon and wine

- and some surprises that became priorities - financially supporting my brother in law through a terminal illness, infertility and adoption, significant co-pays for some health issues with my son, giving my sister a hand through recovery.