The monthly payment will be slightly lower than their rent and never go up, other than property tax increases, so they will breathe much easier.

Can you guys give me any advice on using listsource.com and what main filters I should be using when making my list for fix and flip properties?

This allows them to increase the rent while giving you some breathing room.2) Buy right!

CRE data tools should have a filtering option, depending on what you are looking for you can search by neighborhood, property type, number of units, and others (in your case RI, multifamily, 10-20 units, $x). 

Are you filtering equity of at least 40% and market sale date of at least 5 years?

Could you provide links to the web site so we could filter it through our BS meters as well? 

My question is, what criteria is used to filter down addresses for that initial send off?

I always seem to be holding my breath when we get to that point/

Don't hold your breath waiting for the bank to agree with your lowball offer (which needs to be ANOTHER $5k lower than if you found it yourself, because of your ethically obliged fee)...

@Samuel Persson on Realtor(.)com, choose filter by apartment.