As much as I would say my advice is not the most financially sound, if you are in a position to REALLY afford it, then I say go for it.
When you use other people's money (financing, credit card purchases, etc) it ALWAYS cost you more, but in the long run you have to decide if that extra payment is worth it for you. Buying into
DVC is not simply a financial decision, it is also an emotional one. If you came from a family that always vacactioned (as I did) then you probably value KNOWING that if nothing else, you can go and really whoop it up at WDW for a week or more a year. Hubby's family NEVER took vacations and it took me several years into our marriage to show him that at least once a year, I am going to spend a week (or more) with my toes in the sand at ST. George Island in Florida and that there will be many other little trips for shorter periods of time built in. Then, last year, HE was the one always wanting to stop at the DVC booths and I was the one pulling him away saying NO WAY - ITS A TIMESHARE! Luckily for me, my brother-in-law's sister is a member, so I was able to talk to someone that was involved without feeling like I was getting the sales pitch and it convinced me to call DVC myself and within 5 days, we were signing up.
Life can kick you in the pants at any time. As many here have said, you need to be prepared for the future and unexpected things happening (savings, low or no debt loads, owning your own house, money for maintenance of vehicles, insurance, medical bills - ANYTHING). I do not disagree with this at ALL. What I do think is that it is a VERY personal decision about being able to afford DVC.
My mother passed away last year from breast cancer at 53. I think my outlook on life has changed dramatically because of it and while I do not spoil my children, my family is going to do things that are magical and I am trying to instill in my children that working hard now and living right DOES have rewards. For me, those rewards are vacations in places that make me VERY happy. WDW is one of those places and while my children are young, it makes perfect sense to me that we will spend a good bit of time in the Orlando area - at least annually. When they start whining that they have seen the mouse enough (IF that happens), then hubby and I will take a trip or two alone at times and we will also trade out for a while and go elsewhere (or rent points...so many possibilities).
I financed our DVC purchase because I like having the choice of where to put my "extra" money every month. I buy cars on credit, but always pay them off early, but by not spending my savings or borrowing against my 401K, I still have all of those options open to me at any time. If something comes up during a month (like right now, we are landscaping the yard AND hubby lost his job back in May, so there is not as much extra cash as I would like laying around), then I have the benefit of making just a minimum payment. After the yard is finished, if nothing else is going in, I can add a significant amount to my payment for that month. Either way, I decide my future and my finances for the month. I also never "finance" more than hubby or I could pay with ONE of our jobs. That way, if something does happen, like hubby losing his job, then I know that my job will take us through without a problem without having to dip into savings.
Life is too short to wait. DVC is different than most things you buy because each year you DON'T purchase, you lose. Waiting DOES have a cost in my opinion. Just make sure no matter what happens, you can afford to make your monthly note payments if something bad happens to you.
Also, we bought 250 points. My monthly note is $230 or so. If I rented my 250 points for a year because money was tight, that minimum $2,500 would just about cover a year's worth of mortgage payments. I know if wouldn't cover the note and my dues, but it is always a possibility that I keep in the back of my mind for emergencies.
Good luck with your decision. I am certainly NOT saying that the previous advice is wrong (not having debt, having a nest egg, owning a house, etc is ALWAYS the best financial advice), it is just that in the case of DVC, it wasn't the best advice for me.
Laura