For hard numbers, I can give an example. My effective cost per thousand points (MFs plus an 8% opportunity cost charge on the purchase price) is $4.75. A prime-season 2BR week at BC costs 224K points, so my effective cost for that week would be about $1064---equivalent to a pre-tax room rate in Orange county of about $136 per night. Of course, different owners will have different cost bases, depending on where they own and what they paid to acquire their deed.
A retail purchaser who negotated well would have a cost basis (using MF+8%) closer to $14.50/K, making their effective cost equivalent to a pre-tax room rate of about $410 per night. Of course, that same retail purchaser may get a "discount" on their room, and if they get the best discount they possibly can, (a 50% points discount plus a free one-category upgrade), then their equivalent room rate is "only" $153. However, the maximum discount is almost impossible to get during Prime season, and you have to own a million points to get it. To make full use of those points, you'd need to be taking more than 11 weeks of vacation per year.
So, you can see how buying resale is the only way to go.
That said, if you are focusing primarily on Orlando, you can probably do almost as well just by renting Bonnet Creek reservations from Wyndham owners, as there is just a lot of overall availability in the area. This is especially true if you can be flexible and travel during offseasons. Offseason really favors the renter, because the big owners *can* get big discounts then, and some will pass those discounts along to you.