They will probably need 2k to 3k (guessing here) for rent, food, car, shopping, insurance, etc a month. 

Just saw a episode of Judge Judy.. similar situation.. and yes,, the insulation needs to come out. you could get additional quotes,  remove brush, trash from exterior, any tree limbs that touch building, get exterminator in to bait and trap. next will be holes thru the ceiling from the rats.. any holes or vantage points on roof they are gaining access from, by A/C unit or vents that are damaged.. they are getting in some how and food source is active enough to keep them. 

NOT the bottom .. the bottom are trouble long term.. the top are usually the best tenants.let me explain a little and I am stealing this one from Chris Clothier.rents 600.. to qualify you need 3X  that's 1,800 a month.. that leaves 1,200 for the rest of your bills. so they are living week to week on little upset and your not getting your rent.now take 1,200 rent  3X is 3,600  now they have 2,400 to live on for the month.. we all eat the same food pay basically the same in UTLS.. and gas is gas etc etc. who do you think long term will be more stable.

Definitely food for thought. 

I have just arrived in the San Antonio area and will be staying the month.I'm buying beer / whiskey for any investors, contractors, lenders, and any other real estate (or alcohol) enthusiast, who wants to sit down and chat San Antonio, Lubbock, Austin, and even Dallas DFW real estate.I'm here for work conferences but I also plan on learning a lot of RE, and trying a ton of great food and drink.Look forward to meeting you.

I work just inside the perimeter on the north east side of town...not to far from Buford Highway which has a ton of good food. 

Act of God.. no concessions.. but lots of food loss from fridges going out.. and barbecues.. local dry ice places were totally out.. 

I've gotten 3 quality tenants this way: a bakery, a wood fire pizza food truck company, and a Mexican food truck company.

Food for thought, thanks everyone.

Food for thought, whatever interest rate your paying down is essentially what your making on that money.