@Vince Scolari seen this a bunch in Columbus to avoid the aggressive attorneys they have pursuing property owners for re-assessment.  

I think Internal Rate of Return (IRR) is a better metric to consider when assessing total returns over time.I am not a proponent of "holding just barely enough equity."

Any fee beyond that (move-in fees, pet fees or deposit -a pet deposit can be assessed, but only if the sum of it and the security deposit do not exceed one month's rent- amenity fees, application fees) are barred, even if a tenant agrees to pay, is actionable.

Specifically, does refinancing after a cash sale involve a lender assessing my personal debt to income ratio for approval?

This could fetch $700-$900/month as well based on preliminary assessments.   

Get their verbal ballpark of rehab price, add about 50% to the GC's verbal assessment and make your offer subject to your review of your GC's written proposal, or something to that effect.   

A lead paint risk assessment will identify where the lead paint is that is causing the problem with the child and the risk assessor will provide the owner with possible cures to the problem including interim controls and abatement. 

Makes it tough to accurately assess value beyond cash flow and condition. 

And they want your property value re-assessed to be higher?

Nobody in the world is better at assessing risk than insurance companies.