We've been members since 2008 and we can opt out after 10 years. No "in perpetuity" contracts and besides, you can re-sell at any time (but don't expect to get much for it).
No membership park is worth much if the parks aren't where you want to be, so think carefully. The annual expense is the same whether you use it or not, so you have to spend xx nights/year to at least break even.
Some of the parks are old and only so-so, though they all have club houses, pool, etc. The nicer parks, e.g. Hershey PA or Clermont, FL, are as good as any I've seen anywhere, with good roads, excellent maintenance, plenty of 50A full hook-ups, activities, etc. Most are somewhere in between.
TT "preserves" are generally well away from cities and towns, so if proximity to entertainment and shopping is important, maybe this is not for you. They were designed as places to go spend a week or a weekend "getaway".
If you think TT parks will meet your needs, do NOT buy a new "Elite" membership. Get an annual Zone Pass and try it out. If you like it, look for a resale on Ebay or similar market for pre-owned memberships. You can usually buy one for $1-$100 plus the transfer fee, which is typically around $850 (varies by the type of contract). Some membership contracts have more perks than others, so look around.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL