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

Sorry for not being specific on holding holding period.... 

1) Do we pay the property tax for the house during the repayment period?

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!