@Alecia Loveless is correct--tenants need access 24/7 to their electric service panel, water and heat, assuming those are individual utilities for each unit. 

That's easy compared to trying to fight and erroneous $13k water bill (a real issue we had) or an insurance policy tripling (that too).

With that in mind, you'd also have to make sure the land you'd buy has water and electric running to it already.

That actually is a benefit, as no one is expected to water the yard.  

(And I would tell you to not buy a property that doesn't cash flow unless you have significant resources behind you that could absorb anything that could come at you - like replacing a $5,000 AC one month followed by replacing a $1,000 hot water heater the next).   

While we were onboarding the property to the system and trying to figure out the automated sprinklers, he was out there every day watering the lawn by hand, stopping the buck and taking personal responsibility. 

Maybe the P trap under the sink is not filling with water correctly and allowing sewer gas to come back in.  

I believe the appreciation will slow/stop in much of the gulf towns on the water because of this.

Pretty cool.You probably won't find this type of home in Florida or anywhere where the water table is high.

If there are pets in the unit take a pan from under the sink and fill it with water so there's something to drink.