I have had my heart set on saving up to buy into DVC but have a friend that would like to get rid of their RCI points.
Just the way you phrase this question gives me pause. There is a big difference between owning and exchanging.
The way exchange works is like barter, with RCI acting as a middleman. You put your timeshare into the "space bank" and get credit in exchange. That credit can be used for other timeshares that other people put into the bank. But, it relies on someone who owns DVC actually putting their time into the bank. DVC chooses which weeks to place into the bank as DVC Members decide to exchange out; they tend to deposit less popular resorts and times. That's not to say that they *never* deposit prime resorts at prime times, but it is rare. Finally, for DVC (or other popular properties) you are competing with a lot of other people who don't own DVC but who would also like to stay there.
This is very different from being a DVC owner. As an owner, all of the available inventory is available to be booked by DVC Members on points as soon as the relevant window opens. If you own at one DVC resort, you don't have to wait for someone who owns at another to decide not to use their points for a home resort reservation---you can just book it at seven months.
Here's how that difference manifests itself. Suppose you decide you want to go to WDW for President's Week, 2015. If you own DVC, you can book your home resort at 11 months, and be guaranteed of a stay there. You can look at 7 months, and book anything that hasn't been filled by those booking their home resort---probably lots of choices at this point.
On the other hand, if you are using RCI, you have to put in your search request *right now* and you also have to start scouring the web site every day (maybe more than once a day) starting at the 7 month mark. You have to decide whether you will be flexible on resort choice or run the risk of getting nothing in advance, because matches come in dribs and drabs. You will probably find OKW or SSR first; you have to decide if you will take it or roll the dice in hopes that something better comes along. It could be months before you know if you'll get something; during that time you have to decide when you'll just give up and book something offsite (or travel somewhere else). This process sometimes requires nerves of steel, and is not for the faint of heart.
Now, this
can end up saving you a LOT of money. But, doing it well requires a LOT of
time---time invested in learning how the system works, and time spent managing the process. If you view timesharing as something of a hobby, it can be fun. But, if you just want to book vacations, buy in the system in which you want to stay; don't depend on exchange to get there.