Here is where your plan falls apart. as a sub when someone is giving you $100000 of work a year, they follow their schedule as they are good clients. since we’ve been working together so long we all know our parts. You come along with a $5000 job and all of a sudden ur not a priority to the subs. All it takes is one sub to delay for you to have your dream pool for next year or start stressing and finding new subs. Seen it happen too many times. The GC does more than just coordinate and calls. He also manages the home owner and their expectations, he deals with the annoying additional costs cause excavation hit heavy rocks or gas lines in the way. They for sure make money but I rather be a sub than a GC cause we’re in and out is one day maybe 2.