I have rehabbed some houses in my day. Complete gut jobs. New flooring, drywall, paint, toilets, pipes, sinks, HVAC, water heater, roof, etc.
I also used to DIY all car repairs and maintenance, including oil changes, brake jobs, new exhaust systems, inner tie rods, cv axles, belts starters, alternators, batteries, etc, etc.
And of course I cut my own hair and cook my own food.
The *one* job I will never do again is a roof.
Hire someone else. It's not worth the savings.