Obviously, to take advantage of all of these is ideal, however, specifics can help you round out your portfolio to be the most efficient.

I doubt a cost segregation study on 80-100K houses would be a cost efficient endeavor.

My total take home will be $2700/month after expenses (PITI, trash, sewer, water, etc.)Addressing the second part, while the property still has tax abatement, I may unload it after a couple of years since the property should increase in value due to my additions and the gentrification of the area

Sold data shows them paying Sale Date12/31/2019Sale Price$650,500Buyer NameSph One Lllp [Zillow LLC, look up address]Now the property is back on the market, as pending and in escrow within same day for $662,000.00And they are offering a 2.5% commission.

In the backyard is an additional separate efficiency apartment.

What's the address? 

Recently had a prospective tenant who seemed good in terms of income etc, but lied about being evicted - in fact, she was evicted from the very place she listed as her previous address.

They are currently doing weekly and monthly rentals (some are efficiency type units).

The first option with duct work seems more expensive and intrusive to occupied units.Unfortunately there is no natural gas available nearby to tap into, which is of course my favorite way to heat.Any thoughts or advice in this area would be appreciated.Also curious to know if anyone is familiar with federal or state (we are in MD) tax breaks or incentives for improving efficiency of a building, or converting from oil heat. 

Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.