As someone who’s knee deep in the trades I’ll give you some advice.

First, exercise patience. As you’ve found out anyone worth hiring is committed and contracted to more work than they can handle right now. That means you’ll have to play the long game which will actually work out better for you.

Second, find a respectable GC in your area that can handle the entire scope of work. Sure it will cost more than finding and scheduling the trades yourself but there’s a very important aspect to hiring the GC, their network of subcontractors. Most subs won’t even return your calls but they’re in a committed working relationship with the GC, you’ll get actual results and often times better quality.

Third, the long game. Since you’ll most likely be looking at a start date in the later half of next year this allows you and the GC to come up with a solid plan, budget and schedule. The time invested before the project begins will determine the success and increase the odds of coming in on budget.

Trust me when I say this is much less stressful and productive path than managing a bunch of cowboy subcontractors that owe you nothing past the warranty of their scope.