Its his money and if he wants to waste it why should anyone else care?
I would say if your only planning on doing a few set than it is a waste of money but if you want to do it as a trade or lifelong hobby read as many books as you can, ask questions and hope for answers, and study some top builders port work,then try a set or ten for yourself. If you get really good and people are asking you for specs, dont tell them.