To more directly answer this question, yes,
DVC can absolutely save you money over booking directly with Disney paying rack rates. Rack rate for our upcoming 5 night stay in a 2BR villa at OKW is whopping $4,698 including tax (3 nights fall in the very highest pricing season). That 5 night stay is costing us 196 points. I put the cost of our points at around $7 per point (up front cost per point divided by number of years left on contract, plus MFs per point for this year), which totals $1372 for a 196 point stay. I ignore the opportunity cost if we had invested the money used for the initial purchase, btw, but still there is clearly a savings over rack rate. The thing is, we would never pay anywhere close to $4,698 for a five night stay at OKW, so I don't view that difference in price as money we saved. I think it is important to compare the cost of DVC to what you are actually spending on resort rooms, plus think about how owning DVC night cause you to take more frequent trips, stay longer, etc. Some people might be ok with DVC increasing their trip costs because they think what they are getting in return is worth it. Some, however, might not realize they are spending more each year, not less, and come to regret their purchase.
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