I asked for a rent roll and actual financial details. 

Lesson learned, I guess.

Maybe going forward, don’t complain unless it rises to the level of an actual lease violation or police call, even if it annoys you.

For an example of what I'm concerned with :  My tenants are actually really good, but right now I have an issue where a friend of a tenant literally just drops trash out the window!!!  

Ok….I guess I’ll see you in about 5 years?

You can sell a few to pay off the rest or 1031 them into passive income.Any property you buy today should appreciate about 4.9% p.a. that's been US average (insert a % you believe is right, I believe Milwaukee may actually beat this number) over the next decades and your downpayment is leveraged 4:1, so that in itself produces a lot more equity over decades than you could ever safe up. 

It is good practice to obtain from them the actual 1098 and to remind them that they are no longer entitled to the deduction since they aren't making the payments anymore (again, these things are usually spelled out in the sub2 agreement).

It increases cost for what actual benefit? 

My guess is that the broker is being honest with you and she/he does have an all cash buyer.

I have a guy who has an avionics business that wants mezzanines built for office space, technician training rooms, rest rooms and etc..You actually hit on a great opportunity that is currently out of my budget limits and that is Air Park development.