Needless to say we didn't let her in (cop didn't even understand why he had been called) and ever since then she has been pursuing an ejectment case against us, stating that the investor was in breach of contract. 

My concern is with the SEC and securities laws.  

You will have to hope the security deposit is sufficient.If the tenant leaves during the lease period, the government will pay only until the end of the month that they left.  

For about $600 a year I secured a surety bond for the deposits.

Did a 1031 exchange on another property to increase cash flow and secured a sizable line of credit on properties with large equity to buy more deals. 

That note would be secured by real estate and in my opinion is much safer than a stock, or risky bond.

The landlord and tenant may verbally come to some agreement other than what was in the lease.You should also have gotten the tenant security deposits at settlement from the former landlord.

We're offering discounted rent, no security deposit and no last months rent to the employee so we can get them housed.

from the Wisconsin Broker CE I have taken you are ok to show someone elses unit, hand them a lease, and even collect rent or security deposit, but you cannot negotiate that lease, meaning no variation to what is in print, nor explain anything in the lease.

If you are extending new credit secured by a home you will likely need to have your loans underwritten by an RMLO to ensure compliance.