Having said that, your odds are better if you target a specific type of buyer. 

Who are you targeting as your customers?

I would open it up to one dog with restrictions (under 30 pounds, animal must be spayed/neutered, at least one year old, and a reference from the immediate past Landlord).I suspect you're still over-priced. 3bed/1bath with no laundry?

Cold calling CAN'T target motivated sellers.Driving for dollars CAN'T target motivated sellers.The foreclosure, tax lien, inheritance, probate lists, CAN NOT target motivated sellers.

I don’t think you’d get far with just cleaning unless you targeted short term rentals.

Do this by going to open houses with some friends on the weekends, and target flipped properties in areas you like or want to invest in.  

Your target investment pool is exactly what they specialize in and you'll be spurred on and managed for by an excellent team of systems-minded ninjas!

They have a small 8 pound dog and we are making $20 a month off it, which seems like it should work out pretty well.

With an FHA loan, you aren't an attractive lawsuit target for even the most hungry ambulance-chaser. 

As a syndication attorney I see 100+ offers a year and the most successful target a return that works for who their investors are.