I would be careful of anyone renting at below market rates, as owners who are in foreclosure and behind on their mortgages may be just trying to get the cash up front before they walk away.
I always look for moderate rates with lots of amenities, a good management company in place with a contract, even if from owners, and an availability calendar with lots of rentals! Then I feel this owner will still in business when I arrive and I have some protections in place through their management company!
Sandy