So, part 1 of your previous comment, this guy is basically the GC. What you have listed as the GC above is his subs. He is basically doing what all GC's do, which is get subs to do the work, mark it up, and add his time in the price. The only thing different with what he is doing compared to paying 'John Construction' is basically all of the liability is on his subs not him. So, you better be sure that anybody that steps a foot on your property to do work is insured and has workers comp. Trust me, if somebody falls of your roof, they won't bring going after your "project manager", they will be going after you.
As for part 2, draw schedules can be tough. Crews will not wait 4 days doing nothing while the necessary funds are getting transferred over. They will go on to another job and come back when they have time/finished the other job. With that being said, it is up to the gc to manage the draws appropriately. For instance, when I do draws my profits are built in to the price. Say electrical cost me $4k and I charge you $5k. So you paid me $5k upfront, I will use the remaining $1k to pay people so we don't have to stop work while waiting on the funds. This is the GC's fault and project managers fault. My advice would be to cut out the middle man "project manager" and talk to other investors to get a gc recommended to you.