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. 

There are definitely some decent efficiencies and economies of scale with starting out with multifamily units. 

@Stephen NetoI would ask for a 10-15 day due diligence period for inspection and review rent roll.. if you are not satisfied by the end of the due diligence period you will recieve a full refund of deposit..Just needs to be on the schedule of contract if not already on pre worded offer

Now, these might include less amortization period and/or higher interest rate though.

I have been a member for about that same period of time, I have always looked at the posts and listings and have responded to several of them have contributed as much as I can.

They have a great platform no doubt, and drive great results.However, they are moving into Hotel deals as they offer a scaling-up and efficiency of time and effort, but the management % they are proposing for a real estate deal is 20%... 

Efficiency!

Also, I like to show them the difference in the $$ they would receive between a traditional offer where they cash-out at closing and a seller financing deal where they get interest income over a period of time.Example:  If the Sales Price is $150K and they own their home free and clear:- Conventional Cash + Bank Financing:  Seller gets $150K at closing.- Seller Financing with offer at $160K, $20K down, 6% interest,  30yr Amortization, 10yr balloon:  Seller Gets $237.8K over 10yrsBy showing the a really solid offer on price PLUS illustrating how much more they can make over time by offering financing, you might be able to open their eyes to the benefits of offering seller financing.Good Luck!

What would be the most efficient way to do this?

Then again, I don't accept VA or FHA loans period, so we wouldn't be having this issue at all.