They typically rent in the 1,200 range and are very sturdy (Brick, basement/garage access etc.). 

I walked through the house today, it will be a full gut.the property is a short sale and has been on the market for just over 24 hours.the property to the left was a flip that sold for $164k, and the one to the right is currently being flipped and they're listing at $210k.It'll need completely cleaned out, but here are some definites that it'll need:Roof fixed/replaced (2 leaks and some rust)all drop ceiling removedsub-flooring where the leaks have come through the house and warped the flooringwood floor through out the entire houseHVACa new front door prehung2 back doors2nd story deck is sturdy, but needs a faceliftthe previous owner took out a load bearing wall but didn't support it, so the second story floor is a little iffy.Electrical re-wiredPluming most likely needs to be re-done as well.All windows need replaced (15)Needs to have a brand new front porch.then all the normal stuff.bonus:when we went to the property, there is a 2 car garage out back with an apartment on top that wasn't part of the MLS listing.the apartment would need a full gut as well.it's plaster, so it's not really tearing it down to the studs, but really tearing it to the plaster and starting with a blank canvas.

Make it tasteful but sturdy.

The leash just snapped and it got loose.Earlier this year a Pit Bull mauled two kids in a minivan in Atlanta and one died.

Those SFRs have never been the highest cash-flow properties in the nation, but they tend to be extra sturdy, solid, consistent cash flow.

It is not a cathedral and doesn't have exceptional architectural qualities but it is a well maintained sturdy old structure with very tall ceilings and tall windows.

In driving by one of the units I noticed a woman sitting on the front steps smoking with two small dogs on a leash. 

It's a way for people to "register" their dog and buy certificates, vests, and ID cards that make the animal look legit when it's not;A Service Dog would be trained at the point of purchase and this one is not;You can't discriminate against Service Animals or Emotional Support Animals, but you are allowed to establish rules like no barking and annoying the neighbors, keeping the animal leashed when outside or in common areas, picking up after it immediately, preventing it from damaging the property, etc.

After that the leash is off on us!

So may want to look into rodent proofing.Aside from that those types of buildings can be very sturdy.