Paid his co-worker for the favor from what I'm told.

Do yourself a favor and let the attorney step in...and then figure out what course to take if in fact there is an issue.  

However do it as a Nomad House hack.Nomad - This is where you sequentially buy properties as an owner occupant with the favorable owner occupant financing.

Now if the property is distressed by condition or by management that can work in your favor.

The last one negotiated in such favor of the tenant that we were loosing money while all long they were going bankrupt.

The PM would rationally favor the buyer, assuming they are continuing as a client.  

If you form a good relationship with a hard money lender you can get some very favorable terms.I would try to find a few lenders and chat with them about your plans, etc. 

If you're approaching private money like friends/family/coworkers that like you (these are my favorite go to lenders) I present them the opportunity how I like to see it, which is a favorable win for me, and let them know that terms are flexible so to not shoot the deal down because of one sticking point.  

This works heavily in your favor because the property has the income value approach, rather than the comparable sales approach.

We see that sometimes with FHA, nice round interest rates (3.5% or 3.75% or 4%) are often more favorable than f. ex. 3.625% or 3.875% or 4.125%.