So the overriding message of your post is don’t overextend yourself and sacrifice your financial future...sound advice but certainly not unique to buying DVC.
Lots of ways someone could overextend themselves and never take a vacation, let alone buy into DVC.
DVC by itself can be a solid tool for vacations, but like anything you can overextend and spend too much.
Not really any different than most other things in life...Top Ramen being an exception.
Yep, exactly. Understand the trade offs in life. Balance is important. So is discipline. Keep long term goals in mind when making decisions. Know what your priorities are. And don't pretend for a second that DVC is an investment in the same way that the 529 you have for your kids or your 401k is. Don't use an increase in value for someone else over 14 years - or in my case 20 years - to justify it unless you understand the financial impact on your life holistically.
And, when you've been taking regular Disney trips and your brother in law announces after a life of relative frugality that he is retiring at 55 once the last one graduates from college debt free, don't moan about the choices you made to him. He's laughing at you behind your back. No choice is necessarily better or worse - but most of us don't get to make both those choices.