Last year it seemed to work great and I picked up several properties for a steal. 

You could have 2 properties that are identical on paper but have ARV's that are 6 figures apart for reasons that aren't apparent in the data.  

Once you have cash in hand, you can unlock the unit for 24 hours and let him move his stuff out.I would also consider charging an additional deposit of $500 or something, just to prevent him from leaving all the trash or stealing your refrigerator.

Most will require basic documentation such as a complete loan application, ID, Entity Docs, and 3rd party contact information.

I'd also worry about the showings and if someone steals something from the tenants.

I'd also worry about the showings and if someone steals something from the tenants (or the tenants claim something is missing).Focus on getting the most you can for the property.

Now your upset.. does not make it stealing your money..

If you have a PM that is stealing from you, they probably have all sorts of ways to prevent you from knowing that.I would be surprised if any licensed property manager is misrepresenting the rental amount on the statement.

I'm seeing new neighbors of basically identical houses with maybe 50 or more investors in the community. 

Ultimately, it's difficult to confirm the identity of the borrower.