Seriously reconsider buying a bus from that area, it will have massive rust issues to deal with.
For registration, you can skirt the whole issue by registering it in Vt. Fill out the form saying it's a MH (motorhome)and mail in the sales tax and I think $39, and you will have a registration that says it's a MH, then you might be able to get insurance without an inspection.
Another option if you don't plan on driving it while building is to buy a "Commercial for Private Use" policy on a monthly plan. They normally get a small fee or just first months payment to start, once you get it to NC, cancel the insurance. I insured one for 3 days.