This being said, I don't believe we'll be able to meet the income requirements to qualify for a conventional.This leads me to believe hard money or private lender is more the only option to get my foot in the door, use my business to make repairs at very good rates, build some equity then refi once the balloon is due. 

Private lenders or even creating a small syndicate with a group of investors might also be worth exploring, especially since you can point to your uncle’s track record and your own experience managing rentals as a selling point.If timing is tight, you could look into a bridge loan to secure the property while figuring out a more permanent solution.

I am also having communication issues with this PM - no email responses for days.

Simple things like a branded email at your domain and a website can open a lot of doors. 

I also invest in other assets such as stocks, and private companies as well.

I have been in many properties where private pay people rented and trashed the place. 

Shooting you a private message in a few. 

PMs are busy - if you email a PM and say "Hey PM, I'm looking at 123 Main St. and I think it will rent for $1500 a month, does that sounds right?"

I would talk to a number of residential, private, and commercial lenders.

.- Send emails and texts to all tenants in the building reminding them of "quiet enjoyment" and respectful behavior to their neighbors.- Avoid being the mediator, judge, and jury