Well, if you think you are up to the challenge I will offer any help on this thread that I can.
First you might note that custom builders are not doing so well right now. That means that you can go buy a piece of land and spend all your time and money and end up at market value or worse with regards to cost,even as an “owner builder”.It might be a better idea to buy an existing house.
How do you build a house and hold down a job? What are you going to do if your family member shoots a framing nail through his eye?