IMHO, unless you have built a home before, it is best to pay the General Contractor for his services to, at the very least, oversee the project i.e licences, inspections, etc.

I've worked in construction before, and I've seen the huge problems people run into being their own general contractors.

You can be a sub-contractor to your own general contractor like Larry did with his electrical, and save money there, although some general contractors don't like that because they'll figure you'll take much longer than a tradesman.

There are many options to consider.