It's not just the initial purchase, but the continuing outlay of maintenance fees, not to mention the expense of just GOING. Our trips cost me close to $1,000 -- at least $650 for airfare for the two of us and then the rest for food, etc. That doesn't even include park tickets!
I agree with other posters, save your money and buy a small 25-50 point resale contract to get started when the time is right.
Good luck -- we'll be seeing you as a member sooner than you think!