Anyone interested in following the licensing and business path outlined by chipmechanic should read the BATF NFA Handbook. Not that he's wrong, it's just that the BATF is the penultimate authority on the matter
ATF Online - National Firearms Act Handbook
For instance, from that publication:
22.214.171.124 Business premises. The applicant must have a permanent premises from which business is to be conducted. The applicant must certify that conducting business from that location is not prohibited by State or local law; that within 30 days after license approval the business will comply with State and local laws applicable to the business and business will not be conducted until State and local requirements have been met; and that the chief law enforcement officer at the proposed business location has been advised of the intent to apply for a license.