The old boy is pooped and just woke up from a nap

I'd fire that builder and look for a new handyman. All kidding aside I know what you're going through cause I added a 3rd car garage. The Architecture called for 2x 12 for the roof beams and they were 14 feet long, so I had to call in guys to install the roof beams and the sheathing. At the time I was 60 years old and I thought in my prime till I tried to lift those beams. Good luck with your build and if you don't do it today it'll be there tomorrow.