If you know your comps well you can use the individual complexes’ websites to check their rates, but those can vary widely in accuracy.

But surely you will only do it eyes wide open...with a background screen of some sort, not just believing what you are told.

These roofs are 3/4 inch thick , 6in wide planks .

Of course, my actual bid on the property could vary widely once I see the property as well. 

I speak to other investors in my state (NJ) and they all agree that its a state wide issue.

Since I see that you are in the area, how is the market wide there?

The units will be 20 wide by 30 deep with no garages (600 sq ft a floor). 

I’m a week or two out from starting demo and site prep for a brand new double wide.

Maybe have a discussion that you are afraid she can't afford the rent, and you are considering giving her notice because of this (this nips off the "I'm a bit short" excuses)  along what would be necessary for you to be comfortable allowing her to remain as a tenant (catch up on the behind rent, maybe over 3 months period  AND all occupants PASS background check) . 2-3 working adults SHOULD be able to come up with the rent -- I don't imagine that you are gouging anyone.It is possible that if there is a wide open door in front (no 30 notice required if you move in the next 45 days!)

The field is wide open.