The house was in poor condition, but did pass appraisal and qualify for a loan (after laying temp carpet and stick on vinyl squares myself one weekend and doing some painting on some facia boards...), and has good bones.  1 BD - 1 BA - 600 Sq ft.  

Have an electrician put a temp service pole out back.

Since we are only 3 months into a new lease I'm curious if I'm liable for any temp housing until she can find a new place (or any other considerations I have not thought of yet).

I have dealt with them on the temp. hotel lodging. on the hospitality side they always pay with a credit card,  they paid on time. as for the tenants it is hit or miss.

And in Milwaukee when the unit first comes on, the heat exchanger and cabinet must go from fairly often zero degrees to running temp before it ever begins heating the space.As far as leaving one till it dies before replacing...

When I did get one I made sure that my "new" lease ran for 18 months, or whatever it took to get it to expire in the summer.Beyond that I always made sure the yard looked as good as possible (tougher in some locales than others) that it was well-lighted inside and out and that I had the temp back up to normal and a fire going in the fireplace for every showing.Frank

Being as you're in TN, you likely have no idea what it's like to look outside at water during months of 100+ degree temps.    

Your lease is with temp agency, guaranteed every month for placing homeowners in ST leases, while they await their own home to be repaired .

Investors need somewhere to park all that capital, and REI is looking more attractive as stock market P/Es get too high and real cash on cash returns (dividends, DRIPs) get lower. 

We saw a reduction of over $200 a month on the other owner’s previous year with same average temps.