I plan to build a 6 unit multi-residential building on the back of the property in the next few years which most likely will complicate keeping the current SBA-HEDCO loan due to restrictions of the loan.  

Some states may restrict closing in a personal name, however this would be a lender specific guideline. 

Limiting their options, and restricting their buy box.

Like others mentioned above STR's have become quite tricky but mid-term is still fair game and not subject to the same restrictions.

Due to restrictions in funds I have only managed to till 20% of the land.

@Matthew Wright Check to make sure your town doesn’t have any zoning restrictions on how many units you can have in one building.

Tax Lien: A lien imposed by the government for unpaid property taxes.

Does anybody have a good workaround for city ordinance restricting more than five unrelated occupants in a single-family residence?  

Sometimes condos have stipulations in their deed restrictions that go against doing short term leasing, so I would definitely get your agent or do the research yourself to ensure this isn’t the case at the building you’re looking at.

Coastal NC can be a great market, but it’s important to research local regulations on STRs since some areas have restrictions or require permits.