If the buyers down payment can satisfy the mortgage balance that’s a different story.  

Yes, on a $1 million property, he'd purchase by putting down $100K (10%), leaving a balance of $900K (called the principal).

Debt is easy to come by and still great rates, but of course the market prices are high in the areas you are familiar with which makes cash flowing the properties difficult.  

That probably isn't difficult to do, but will require some research beforehand to find a broker that is willing to allow you to do so. 

Commercial lenders will build some checks and balances into your purchase process so you don't get stuck with a low cash flow deal like this.

However, this is extremely difficult.

@Robert Walston The lender I just gave the "green light" to get pre-qual'd mentioned putting 20% down to help lower the monthly payment, but I didn't really question it, as I don't plan on doing that if not required.But something that did catch me off guard was that he suggested I might need to show the (income) ability to carry the entire note, as if there were no tenants.This may not be difficult for a duplex but a 3-4 unit would be.

I am from the Philadelphia area.Just recently went through a difficult time, having to deal with a difficult inspector and having a cease & desist order on one of my buildings for a month, resulting in resident tenants being forced out and commercial tenant having to shut down their business.

That's my goal and desire, but finding listings that are remotely close to the 2% benchmark is extremely difficult.

As Chad mentioned Maryland is difficult as well but I have 20% of my portfolio there as I took the time to understand the rules and put a kick *** team in placeIf you are new to note investing them I agree wholeheartedly with the other comments - once you get some experience then you can decide where to continue to grow.