There are so many things about the 'value' of
DVC.
But the one that is most valuable, and mentioned the least, is that DVC is a huge hedge against inflation. This is because the number of points to stay at a DVC-resort is basically fixed. Compared to a hotel room that goes up in price every year.
Suppose you own DVC and stay in a Studio that costs 12 points/night. Your Maintenance fees are $4/point, so effectively that room costs you $48/night.
A regular WDW hotel room at a moderate may be $150/night plus tax or about $168/night.
You can equate the up-front costs as purchasing DVC as applicable to that $100/night difference. After a few years they have balanced out.
But, when you throw in inflation, DVC starts saving you considerably more.
Let's say inflation runs at 4% for the next 5 years. Your $4/point dues would then be $4.86/point, but the room is still 12 points, so you're effectively paying $58.32/night, an increase of $10.32/night.
Now the $150 hotel room also goes up at 4% inflation for 5 years. At that time, including tax, the room is $203.50/night, an increase of $35.50/night.
If you looked at a 5-day week, the DVC-room has increased $51 for the week, while the hotel room went up $177.50 for the week.
Now go another 5 years, or 10 years, and the difference really starts to show.
Many have done various spreadsheets and the 'payback' is around the 6-9 year timeframe. After that it's real savings.
Not factored in are things like money you'd get back if you sold your contract after 5 years, or 10 years. Also loss on investment (or interest payments if you finance, etc).
Also not factored is weekends. DVC villas require more points on weekends than on weekdays. But the hotels are also changing to have higher rates on weekends now too.
Anyway, that's the 'basic' dollars analysis. Everyone else can explain the other 'values' to ownership.