Had a call this morning from a fellow with two larger duplexes on the same lot, in a strong rental market and principle amount well under market price.  

If there is money left over after all that, perhaps you need to do nothing.Paying more money to the principle just to get the deal to work is only artificially making it work.

Some people might pay more for solar powered rentals on principle and you presumably could also get the tax credit could be a win win. let me know if you find out about credit I might consider trying this for one of my buildings.

These are professionals with additional training and a stricter code of ethics.

It does not include debt service (principle and interest payments). 

The reason is so you are educated on the legal and ethical aspects of selling homes. 

I don't want to be unprepared when it comes to responsibly/ethically connecting sellers and cash buyers on an all around "win-win" investment. 

I have made the mistake of thinking just because someone is on here they're experienced and ethical.  

If you still have time you could rent it for a year, pay down the principle and then sell it for more than 55k if it keeps appreciating.That's another factor, is it in an appreciating or depreciating neighborhood?

This is unchartered territory for me, ugh, having faith in people's work ethic, quality and honesty!