Work with your commercial lender/insurer/lawyer/personal banker and see if they know of any interested parties.4. 

Several options you can explore to get the down payment capital: Solo401k; HELOC on personal residence or from equity of the SFR; Cash Value Life Insurance Policy; Business Credit; Private Lenders, to name a few.

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.

I'm unsure if I would use property management at this point, and there would be some insurance.  

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

Quote from @Shakthi Kamal: If you don't know the answer, choose the umbrella insurance.

My biggest one, a complicated, large Tudor style home with an ancient cedar shake roof (full tear off and complete redecking) cost me $10,000 by a licensed and insured contractor.

However, a different niche such as insurance placements, might very well be in the 70%~ occupancy level but the rents are going to be so much higher that the occupancy rate (comparatively speaking) is irrelevant.

And given #3 above, it leaves about 20% of rent for all other expenses like property tax, insurance and other PM expenses like leasing fee, eviction fee and other minor expenses like for e.g landscaping, pest control etc.

Insurance companies are taking a close look at building materials, quality, and updates.