The playlist currently has 126 videos. It's here: https://www.youtube.com/watch?v=AGCC-_Cuhhw&list=PLRZePj70B4...
My impression after watching most of it: It might be "easy" to build your own house once you are an experienced contractor. If that's not you, then it's going to be a second job, or even a third job (building and learning). You will need to hire and manage subcontractors - the kind of job the contractor does. If you like that sort of thing and that's how you want to spend your time, go for it. I personally think that my time would be better spent finding a better job in tech and getting a promotion, so I can hire a professional to do all that.
I think he only really goes over the top with concrete.
His finish work is finicky. I'm thinking of those craftsman columns on the spec house. Most people would just caulk and be happy with it.
Each mock-up slightly bigger than the last, until one day...
Plan on hiring a plumber, electrician, and HVAC specialist. Probably another 3-6 months to figure out all the paperwork.