I've rebuilt many cup and cone BBs and never owned a hook spanner or pin wrench. Channel Locks, if used carefully, can easily remove and replace the lock ring. The adjustable cup can vary. Some have two holes (needle nose pliers work on these), some have slots (flat blade screw drivers works on these) and some have wrench flats (crescent wrenches work on these). As he is dumping the old BB anyway, there isn't even a need to be overly carefull in the removal.

It would be a good idea to pick up the spline socket as this will allow for future maintenance to be done and, as most others have noted, there is really no alternative to a crank puller. Assuming he has a few basic tools laying around, he should only need to spend $20 on tools to do the work himself.