I agree with Setsquare! We have found that the RB112 is just not able to handle heavy loads as well as the 532 can. But we are going all out and are slowly changing our highsites to PC based routers at the moment! (Perfect use for that old pc u have lying around!!)
If he has two old PCs floating around, well that would answer his financial issue as well, but if its just a point to point connection between two friends I dont see a problem with the 112.