Probably your first piece of investigation is to work out how many points you'd need and how it would be possible to minimise the # of points you'd need. Rule #1 in points usage is to minimise the amount of weekends you use, either by adjusting your vacation dates or by using alternate accommodation if possible around the dates you are working with. One of my "tricks" would be if I was arriving relatively late ( after 6.00 ) into Orlando on Friday or a Saturday would be to check into an offsite hotel for that night. Coming from the UK as I did then, most flights arrived late afternoon US time (close to midnight UK time) so we'd be pretty tired after a 10 hour flight. Just grab something to eat and head to bed. Get up early the next morning, drive down to WDW, pre-check into the
DVC hotel and either head for the parks or make use of the hotel facilities (pool etc). IMHO I'd only have slept anyway so paying 25-30 points ($250-300) for a DVC unit when I could just pay $40-50 for a cheap motel for the night doesn't make economic sense.
Anyway here's a link to the points calculator. Play around with the resorts, room types and dates that you're interested in, you'll be suprised how much difference it can make if you are a little flexible in your approach.
http://www.wdwinfo.com/resort/dvcpoint.cfm
If you haven't done so, here's a link to the main DVC boards, if you search through the topics I'm sure you'll find many posts asking about the proceedures for renting points
http://www.disboards.com/forumdisplay.php?s=&forumid=28#DVC-MAIN-discussion
Finally here's a link to the points for rent board, it does seem at the moment there are a lot more requests for points than there are posts offering points, but I'm sure you'll still find points for rent that are at a price that makes for a great deal on some excellent accommodation.
http://www.disboards.com/forumdisplay.php?f=29