There are large demographic and economical forces at play that wiggle small airplanes around like a dog wiggling its tail. One way for the OP to get ahead is to get personally involved, do dirty and boring work, find parts, nudge the schedule, buy pizza, generally become a guy that is good to have around, the shop has to have the feeling that the OP fixes more problems than he causes, profitability is higher with the OP doing stuff than with the OP not involved, by doing helper work you replace a guy that costs the shop let's say $30/h and is billed out at let's say $110/h. OP has to find a way to balance that out. Once the balance is established it is beneficial for everybody, once the shop trusts you they let you comb through there parts storage on weekends because they know you pay on Monday and bring pizza. This works for handy people, the shop then has to explain to Joe why Phil is allowed to work on his own airplane while Joe is not allowed to enter the premises. The concierge service means in the last consequence that the OP owns and operates a maintenance shop, beware what you wish for, once upon a time I knew a guy in Vienna Austria who owned a Citation, unhappy with the performance of the avionics shop he bought it and started to manage it as a hobby, think he got personal pleasure out of it, RAF trained fighter pilot and successful business guy. Key to successful small pane maintenance is to find the best setup you can and then support, manage, and subsidize it as needed and you will achieve amazing things, I keep fingers crossed....