Detailed prints that include eletrical to floor coverings are provided to all subs for bidding. What rock lengths and even corner bead is called out in the prints. This won't be our first rodeo.
I just want to preface this post by saying I am only playing the "devil's advocate" for you here. I am not arguing with you, just offering some advice from my experience that you may or may not use. I wish you, as a fellow poster the best of luck in your endeavors. If this turns into anything other than a healthy debate, I am out.
I am assuming that you have personally supervised interior remodels (baths, kitchens, additions, and basements) before, and my question would be
what would have happened if you were not on site to catch "this or that" potential disaster before it occured.
If the sub you have in mind is mindful and experienced in how a remodel needs to be scheduled, and can adapt to schedule changes, is good with customers, can manage bids, can help the customer make decisions, can schedule material and other deliveries, can account for and manage change orders, etc. and can actually SELL the job on top of all that, then you have a winner that is worth MUCH more than 40K annually.
Additionally, if you find that your candidate has these qualifications you will be always at risk of him going out on his own.