If the main thing is saving money,
DVC isn't a good deal.
DVC is more likely to be more expensive over the long term than "other" options. It is a timeshare, not a hotel discount program. Which means you need to use those points before they expire. Even if its a tight financial year and you need to replace the furnace (you can rent your points, but no guarantees they'll be rentable)
Cheaper options:
Staying value
Staying offsite
Booking when Disney has good deals (free dining might be a better deal for you, for instance)
Renting points - particularly if you aren't going to go every year or every other year and don't want the commitment.
Buying an offsite timeshare resale (there are some great deals, some which trade into DVC).
DVC is a good deal for people who fit multiple of the following criteria (not necessarily all, but if you only fit one, it probably isn't for you).
1) Can afford to tie up five figures worth of money in a timeshare
2) Can pay cash (but might choose to finance)
3) Are going to stay in moderate or deluxe resorts if they didn't have DVC
4) Are going to go to Disney (and specifically WDW, not cruising and not - unless you own at
Disneyland, Disneyland or Hawaii, unless you own at Aulani - availability at those two resorts appears to be particularly challenging for non-owners) at least every other year reliably for ten years
5) Want more space than a hotel room provides (and are willing and able to pay for it).
6) Can project a fairly stable financial future ten years out.