Definitely check out the DVC Rent/Trade Board. You can find a lot of answers there.
In short, renting DVC points from an owner can be a very good deal and will usually be cheaper than booking a room for cash. However, you do not have the same flexibility as a regular reservation when it comes to changing or cancelling your trip. Chances are you will also have to pay for your stay when the reservation is made, although some members will work out terms.
A 7 night stay in a studio at the BWV at the end of Feb would require either 111 or 134 points, depending on view. At $10 per, that would be $1,110 or $1,340 for the week, $158 or $191 a night total. Given that rack rate for a studio is $269 plus tax, that is a pretty good deal. I have seen studios at BWV with a code as cheap as $199 per night, but that is still more than renting points. Yo can get as many or as few nights as you need. If you happen to only need week nights (Sun - Thurs) you can get the room as cheap at 11 points or $110 per night - a real steal!
You don't get daily maid service, but you can purchase it for $25 a night if you find it necessary.
The basic process involves you finding a member with available points (easy to do thru the DVC Rent/Trade Board), having the member make a reservation in your name and provide you with a confirmation number and written confirmation, and you paying the member for the points. You do have to be a little trusting when it comes to renting points. However, the member renting the points is taking a risk, too. It is nice to know that there has never really been a problem with rentals arranged thru this site. Some members may provide rental agreements that might give something more in the way of assurances.
We rented points from a member last year to stay at VWL. It worked out great. So great that we bought DVC ourselves. I have recently rented points to people and it has worked out very well for everyone involved. Feel free to PM me if you have more questions. Good luck.
