typically with seller finance there would be some period of monthly payments and then a balloon where you pay off the balance in full. 

The requirement to do this generally involves an experienced GC signing on the borrowing entity as a 20+% owner thus making them a signatory on the loan and responsible for the debt which in most cases is not very easy to find.

Permit eligibility is based on region (usually the west side of town) and density (quantity of surrounding STR's in the area) as well as percentage of landscaping and minimum parking requirements. 

Cleared the metering requirements on license being issued? 

PM fees are high, exactly because so much work is required in managing STR.  

Real estate is NOT a passive investment and requires lots of analysis and education.

They do require that person to have no assets, so a house in her name could be problematic.

If you ask the manager to justify a fee and he starts hemming and hawing, move on or require them to remove the fee.

I'll add a few more things that can have a huge financial impact: required reserves, LTC (loan to cost), application or other upfront fees, and prepayment penalties.As a fellow flipper, I think it's important to have reserves, but they shouldn't be required as part of your funding.

Most building codes and HUD standards require bedrooms to have windows for egress and ventilation.