If you do not have knowledge of all the trades, it could cost you a lot more money.
Sub-contractors may not want to work for you or worse, take advantage of you.
Hire a reliable builder in your area. Check with the local Inspection Department to see who they enjoy working with or have no problems with. Ask to see some plans of projects like, what you would like to build and see who built them, find out from the homeowners, how it came out. They can't make recommendations but they can lean you in the right direction.