In these instances, you'd have to check things like flooring, plumbing for leaks, roof for leaks, hot water heater, and heating and air conditioning units. 

This would normally depend on the condition of the property and the Condition of the tenant.  

I think BRRRR can still work really well under 2 conditions: 1) you have another substantial source of income and your capital is somewhat renewable (I don't) or 2) you're willing to compromise on your target areas and move to secondary, tertiary, or out of state markets (I am not) or 3)  you're very lucky and/or skilled at acquisitions (I am from time to time).  

It just is harder or easier depending on market conditions (and investor deal flow).

Since you're in FL, mobiles are prone to severe weather conditions which has happened time and time again in the past. 

Getting them to pony up even when they are at fault is impossible.2) This condition existed when you purchased.

All the replies above are based on ASSUMPTIONS about the condition of the plumbing.Is the plumbing able to handle the “standard” amount of toilet paper being flushed and the tenants are just “loading it up” before flushing thereby causing the problem?  

You know you already have or can find a buyer for this very same property in it's very same condition for $150,000.

Do market conditions, taxes, or potential rental income play a big role for you?

I would explain to them that for the unit in the condition it is in now that the rent is still below market rate. 2.