I know how to do drywall as well as a pro - it just takes me 6x as long. It is easy to do, but you can't do what the pros do without a lot of practice. By planning on 6x longer you can slow down, do thiner coats and such (pros do 3 coats of mud, I do 6 for the same thickness). Which falls into the do or hire.
It’s really not hard. I added onto a house I owned back in 2009 after returning from Iraq and saving a bunch of money. IRS also gave me a huge refund that year. Something with GWOT vets and taxes with combat pay. Anyhow, converted a covered porch to a room, had permits, raised the floor, added electric, energy efficient Argon gas windows, etc. You give 84 lumber the blue print plans from the architect and they tell you how much material you need. After I got to the stage to add furring strips for the concrete block part and insulation (which is easy too), I was ready to add the dry wall. Just lift it up to the wall then screw it in. Dry wall tape, corner bead, and mud to cover the seams. Orange peel can hide imperfections. Then paint. Pretty straightforward
True. In this case it was drywall in a poorly lit basement, so I wasn't all that concerned about it turning out perfectly -- but it absolutely did turn out much better than it would have if I tried to do it myself.
Dry wallers are amazing. As a diyer, it’s one of the few things I can never seem to get right. I’m happy to put holes in it, but seeing professionals patch it is another level.
When it comes to drywall, always hire a professional. Learn from other's mistakes... it's not as easy as you think and it won't turn out well.