This is a conventional loan where they also cover your PMI (private mortgage insurance).

This should include potential rental income, expenses (including property taxes, insurance, maintenance, and potential vacancy), and your expected return on investment. 

. - some strategies I've seen California investors use to lessen negative cash flow: house hacking, mid-term rentals (people temporarily displaced from home renovation or insurance reasons like fire), rent by the room, Short Term Rentals. - The ultimate house hack, live in the small ADU unit and rent out the two levels of the main house on AirBnb in San Francisco (I would have thought STRs are oversaturated in S.F. but it worked for them and they stay fully booked).

This is also accounting for my increase in insurance costs due to adding insurance to the ADU. 

I look for cashflow to service the debt, repairs, cap ex, taxes, and insurance while the equity grows, my taxes are decreased, and rents are increased to make more cashflow. 

If it's in a high tax /flood area taxes and insurance could easily be 5-6k or half that then with title insurance points and closing it could make senseWhat is the breakdown ?

Florida is a unique state for MHP law and the insurance has gotten very expensive there too.I recommend checking out @Frank Rolfe's mobile home university content if you haven't already.

The bottom line is it important to be on both sites in order to get the best coverage of the available guests. 

Affordability is no more that $4500 per month  morthage/taxes insurance. 

The biggest differences between residential and commercial:  Scalability, financing are very different, property taxes may be different, Insurance is definitely different.