Also you should inquire with insurance agents about the cost to insure.

The way I interpret the following policy clause is that so long as the property is defined as other than "VACANT" which is the case when the property is being "constructed, altered or repaired", the 30-day time period and vacant status does not apply in this instance: We do not insure any loss at your premises if your dwelling has been vacant for more than 30 consecutive days immediately before the loss and the declaration page indicates an occupancy other than “VACANT“.

The properties in OK, which are roughly 30-40% smaller than my personal residence are only about $400-$600 cheaper than my FL insurance.

Life Insurance covers everything 

That will only leave healthcare to be something I will not have direct ownership or control over as I cannot feasibly own a hospital, nor an insurance company.

With that they may be able to recoup from their renters insurance (hopefully you require this)  If locks are damaged and the unit isn't secure you would need to take care of that right away.

Property taxes are 650, insurance 160, outsourced property management takes 10% of the rent, and another 10% of the rent is set aside each month for future repairs. 3750 x 0.8 = 3000. $3000 profit, minus about $2300 in mortgage, property taxes and insurance leaves about $700 cashflow, when I move out.

The agent has insurance, but clearly, they should not be an agent if they don't disclose this. 

I get FinTech is a high-risk activity, but imagine the industry will consolidate to one or a few strong players.

Its a lot of money to put into someone who's new to their life or the industry.