There are a bunch of different ways to calculate annual "actual cost" -- all of which give different results.
The simplest method is to recover your annual maintenance, without regard to your capital investment (initial purchase). After all, you've spent the money, and, presumably, you got so much benefit from your stays and the park pass program (which ended in 1999), that you've already recovered your capital, especially if you bought back in 1995.
A method that many people on this board have suggested is to divide your capital investment by the number of years until 2042, and then to add the maintenance. That's better than ignoring your investment, but it doesn't really account for the value of the money over time. (To give an exagerated example, $1 million all at once and $1 a year for a million years are not equal.)
A better way to determine the value of the initial investment over time is calculate what an annuity for the same amount of capital would generate each year until 2042. That yields a much higher number than simply dividing the capital by the number of years. The higher number is realistic because, after all, you could have put the same money that you put into
DVC into an annuity instead. But depending what assumptions you make about investment yield and taxation, you'll get wildly different results. And if you base your assumptions not on a conservative annuity but on a highly successful stock portfolio, the numbers are higher again. Once again, you would add the annual maintenance.
Finally -- and I think this is the most meaningful -- there's the value you place on the "buying power" of your DVC points, in relation to what you would otherwise be willing to pay for your resort accomodations (not the rack rate of the accomodations, but what they're worth to you).
It's nice that you only charge your friend your actual cost, but the actual annual cost per point could vary from $3 to $20 per point depending upon how you want to define the term "actual cost."