@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. 

Rates will range from Prime (currently at 7.5%) to Prime + 4% (11.5%).

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).

However, you will get a range of perspectives because several here don't mind and even brag about losing monthly.

Things like a new roof can range - here in Philadelphia where i do a lot of work, our flat rubber rowhome roofs are fairly inexpensive and standard . . .

Another post someone made a comment about how “he can help the seller avoid foreclosure”These types of predatory messages also can get you in deep hot water as they have no intention of helping they just want the house at a discount

It's been great - the property is 100% paid off and the house is worth 300-340k generating approx $2300/mo (that's after utilities/management fees etc.)I'm considering selling the property to buy 3 more within the same price range in the same market. 

Looking at this mathematically, if you assume a 50% non-renewal rate (industry standard) and use the low end of the range of $5,000 per non-renewal, there is a loss of $50,000 per year on a 20 unit property.

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

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