I agree with all of the above, especially with looking at member fees as well as sales price. If you want to stay at WDW, buy a home resort at WDW, not offsite like VB, HHI, or Aulani, because trading in is getting more difficult each year as the overall number of members increases but the availability at the most desired resorts (especially the near-park resorts) remains the same. My advice is to buy where you want to stay, or at least at a home resort where you won’t mind staying if nothing else is available at the 7-month window when owners can book non-home resorts.
Be aware too that each resort ownership ends on a specific date. The oldest resorts (OKW, BWV, BRV, BCV) all end on January 31, 2042, although some OKW deeds end in 2057 (long story there). Depending on how long you anticipate wanting to visit WDW (based on your age, kids, etc.), the end date may be more or less important.
Finally, you say you want a small contract. You can bank and borrow so that at most you can use three years’ worth of points on a single trip. But DVC works best if you visit every year or two years, otherwise you risk stranding points and losing them.