@Jake Soper do you use a CRM? 

If you got a report that someone was smoking cigarettes or cigars outside only, per the rules, would you post the same question?

If you have a marketable property and its listed these agents will contact you.

ETFs would be a better option if you use Margin.

The source of the loan does not matter.So yes, if you borrowed $100k and used $50k to buy B and another $50k to buy C - you deduct half of the interest against B and the other half of the interest against C. 

For those interested, a combination of mortgages with no “due on sale” clause, mortgage companies loose due diligence, and title insurers willingness to “turn a blind eye” to practices that wouldn’t pass scrutiny now, resulted in tactics like the “second mortgage crank” which not only allowed investors to purchase properties with no money out of pocket but allowed investors to actually walk away from closing with “cash in their pocket”.

I have done it with some contractors taking Paypal where you can use a credit card on that site with a fee, or QuickBooks is another one too.

Provided you are sticking to the letter and spirity of your rental agreement, you have to set boundaries People that get indignant over you setting boundaries are not worth worried about. 

As fund manager you owe your investors a fiduciary responsibility which I can foresee as a basis for lawsuits should the fund not perform as anticipated.  

I don't know the Baltimore market but have a friend who is a very savvy investor there and maybe he would do some coaching to help you understand which way is up.