Tenants should take responsibility for how clean the inside of the house is .Things dont sound right to me.........The tenant never mentioned the carpet was wet .Lifting up carpet would only show maybe 1/2 inch of "mold" on baseboard .

those are pretty tall hurdles to get over... caution would be my thought..not a lot of room if it does not quite go right. 

You have to stay on tp of them every day and never ever give an inch.

Alternatively, you can pull some information from county recorder, however that will typically be a situation that has escalated from administrative citation to a legal action far beyond tall weeds and broken windows.Few will ever venture beyond their first "no" from a clerk.

I hadn't thought about it being too tall.

Insulated plywood in my area is like a SIP with foam insulation between two layers of plywood. 2" would equal R-13 because it is 6.5 R per inch on many types. 

I guess that would be why apartments are generally tall.

I met with several people at the city planning and zoning and BINGO... they said"highest and best use for that address is a Medical Office Bldg, 40' tall, blah blah blah "and they were right!  

Can i use 1/2 inch cement board for a sub floor in my kitchen had flood ripped up old sub floor now instead of putting new down would like to use 1/2in cement board 

This is a tall order and would be easily be $100k in cost plus you have the paperwork for the conversion.. and don't forget fees to the Municipality (could be as much as $1k).