Now, I can't see any of your other finances, what your household income is, what other goals you have coming up, nothing.  

We require monthly gross household income to be at least three times the monthly rental rate.

After we did the exchange I informed her I flipped houses, I have a building full of materials if she was looking for other household goods. 

My wife and I live in Chicago, Illinois, we live in a house we recently purchased and have one condominium that we currently renting out.

We require monthly gross household income to be at least three times the monthly rental rate.

As for the septic that could cause unique proportys in a rental, if your tennent doesnt know better they could really mess it up flushing things that dont degrade or kill the bacteria in the system by dumping household chemicals down the drain. 

A example would be a boy friend and girlfriend live together and adopt two unrelated children, that is four unrelated people by blood in a household yet they live as a family. 

Also, utilize the MassSave program for any quick renovation upgrades (0% interest for 7 year loan on energy efficient household items).

As it turns out, in real life, not lost inside some stupid appraisal theory book that provides unicorn examples, that the only time matched pairs analysis is possible to the degree that might be anything better than laughable, happens with property like a very large condominium complex where all the units are very similar to each other.

@Daniel Hayes since the Nashville market is on fire why not buy land & build new high rise condominiums/apartments.