I am a tech. I have seen far too many owners want one tech per bay. A good tech needs two bays. Parts slowdowns or that broken exhaust manifold bolt can kill a productive guy for hours if not days. I agree on a GS guy. Finding them is another story. I started out busting tires and running the stud hopper. Those kids seem to not exist anymore. They play on phones or talk turbos.
I do not want to manage a shop. I am dirty fingers and hands on. Reoccuring U codes and such. Hiring a fast hack is only making him money while the top guys suffer. BTW, a flat bay is not a bad thing. All doors open. Room to breathe. Good techs are hard to come by these days. The flush game ran out fast due to oversell. Identifix is so overloaded with crap it is almost usless.
Big jobs can equal big problems. I have a third bay hack now who crushed the fuel lines on an engine job. It became my responsibility to find new ones and fix it. For nothing. I could have killed 2 Taurus 3.0 pushrod timing covers and diag on that rough idle on the Caddie CTS for that.
Smart techs will not stick around to be a team player. Pay them or become a lube shop.