Account Closed  your comparing apples to oranges.. the OP is asking about COC for buy and hold and your talking about a flip.. flip's of course have much higher return on investment when done right.and frankly it sounded like your were posting an add looking for  a money partner.

I send my best regards to the op and hope he figures out the best solution to his dilemma. 

The OP asked, "What's a good cap rate?"

Hard to say anything on this, since I am not familiar with the laws in the Chicago area where the OP is from.

Following - was about to post exactly the same Q as the OP :)

"21 Years Old- ON THE SEARCH FOR MY RICH DAD" ... lol, I read that title, and immediately thinking OP is a hottie  :-D 

OP- There's a lot of websites with info on hard lending, it probably differs from state to state.

I will stop there and let some others chime in and give the OP to ask more question or explain the idea of the structure a little more to comment on.

@Joel Owens I believe the OP has found 3 triplexes (9 units) and 7 of the units are presently rented at $400/mth for a monthly gross of 2800 [with a scheduled rent of 3600].

Where we disagree is with the advice you gave the OP where you advised him to avoid all crowdfunding marketplace sites and go 100% white label crowdfunding.