It's basically a thick sheet of firm rubbery material you put down under the flooring that helps prevent not only foot traffic noises but also ambient noises from passing between floors. 

In addition to the FCRA, the other major risk is identity theft.In order to even be permitted to run credit reports, my PM company had to go through a physical site visit from a representative of the credit bureau to ensure we have physical (locking filing cabinets, etc), electronic (password protected computer lock screens, etc), and procedural (written policies) safeguards in place specifically to prevent the release of SSNs and other personally identifiable information (PII).So legally the PM cannot and should not share a tenant's SSN with you.Note: I have no affiliation with the Law Office referenced in the above links.

I would try to stagger it over a 90-180 days to prevent you from having 100% vacancy. it may be in your best interest to move them all out at once.

This option may prevent you from being cash flow positive for a couple of years, but you should be able to gain equity in your rental property over time. 

Or is it just “be afraid of this thing you can’t prevent, and can’t avoid”?    

B. prevent my brother from moving in & turning the house from a cash flowing asset to a liability costing me money?

A little proactive education can easily prevent injuries and damage in some circumstances, but you should generally cue off of innocuous questions or comments, rather than making assumptions, unless a caseworker has suggested they would be unfamiliar.

I do not want out of the deal, as I've already secured insurance and funding for the rehab, plus it's a good deal, however it's unknown at this point how much time this could add to the process,plus I feel like I should be compensated for the inconvenience for tying up money and preventing those funds from working somewhere else.

on the other hand because of pressures for europe the fed may cut rates to prevent a global recession, but again i dont know what will happen. but if prices dont go down and they go up when you move now the price is over 1mil you will have to deal with "res a" property tax which is a lot higher than regular residential tax.  

These loans cannot exceed a certain amount in cost and fees which was implemented in the Dodd Frank act of 2009 to prevent lenders from excessive fees.