@Ben LeybovichI think in the perfect world, new investors would spend enough time and energy learning how to analyze properties themselves, what the various calculations mean, etc.

Do that before you spend any energy trying to kick him out.If he hasn't paid rent, you can call the police and have him escorted from the property. 

For me they've been a great source of ideas, resources, energy, and comradery.

You're asking someone to spend a lot of time and energy to share what they've spent years - maybe decades - learning and developing.

This added so much to the overall cost and took up more of my time than I expected.Overall, it was a huge waste of time, money, and energy.

However, we typically use the FHA-203k loan because it involves a renovation, which I highly recommend if you are looking to really boost your equity and have the cost of the renovation wrapped into your loan with a VERY LOW AMOUNT OUT OF POCKET.I like the FHA loan, but honestly, the Fannie May Home Style is an even better product at this point because you just have to bring a bit more cash to the table 5% vs. 3.5% (w/ FHA), but you have a bit more flexibility.  

@Elliot B.I doubt a energy meter based on airflow, heat - etc - of any variety - would hold up if challenged in a court of law - 

However, what I would suggest based on your expertise as a contractor is going into a semi-fixer upper and make minor repairs to boost equity as well as savings. 

With the new subway line being built nearby, do you think this could boost demand for smaller, ADU-style units?

@Trent Reeve completely agree, but I'm hoping this helps some operators start thinking about what they could offer additionally to keep boosting their revenue.