Has the potential to add a 3rd efficiency unit with a 90% finished 3rd floor.etc. etc.Here's the problem...The sellers of the property offered it to me for $200k if I could get financing.

While on the subject, any tips for ensuring (as best as possible) that I am able to secure a tenant(s) into the other units as soon after closing as possible?

Consider diversifying your portfolio by exploring various types of properties, such as single-family homes, multi-unit buildings, commercial properties, or vacation rentals.

An enrolled agent (EA) is a tax professional authorized by the United States government to represent taxpayers in matters regarding the Internal Revenue Service (IRS).

In under 10 years I've bought over 2000 units (and own about 1000, due to selling some).  

If you choose to buy another primary you can use Fannie Mae and only need 5% even for a 2-4 unit.

The guy that owned it had like 20 other similar units on the side of the same mountain.

I like the idea of investing in multi family (4 units and under) and maintaining the stability of a fixed 30 year mortgage, however am open to all ideas.

Even in my core markets like Berwyn, where we lease all the time, I still talk to have a dozen friends who own and rent out units to get their sense of where the market is when I am getting ready to list. 

'mid-term' and it's just an aspect of renting a unit this way that you'll have to deal with.