IMHO, which in this case, probably doesn't count for much, I think he will enjoy scrolling. He will have support of the table to help with tremors, my only concern would be the blade changes, he may need assistance with that. I know many scrollers who are handicapped in some way, with tremors, short fingers due to accidents. I even know one scroller who has lost an arm, he has a prosthetic, uses it while scrolling, and really enjoys his hobby. He is also one of the best scrollers I know that does not do it for a living.