-Fix Roof-Renovate and re-arrange walls-Redo Electric panel and seal from moisture buildup-Remove tenant (found out she was section 8 but I got lucky and they already found a place!

They are not expensive, but could save you a tons of money if you start having moisture issues.

Home had OSB that was sagging and moisture had accumulated in several areas. 

That usually isn't a problem but it can be if the area has moisture.

So the smell can penetrate the sheet-rock?  

Its a thick clear liquid that continues to penetrate into the wood long after treatment.http://www.sasco.ca/sites/default/files/BORACOL%2020-2%20BD.pdf

I called a contractor & he mentioned that putting laminate over a concrete (moisture issues, ground floor)) would not be cost effective for a rental property.

For one house with a major moisture problem, I installed a 10-in.

So we had both slab and pier and beam in soil with high clay content and pretty extreme seasonal moisture and heat variation.

Use a primer for any type of self stick to lock the dirt in place(Glue doesn't stick to dust and never EVER mop the subfloor as it puts moisture back into the wood/concrete that might take days to wick out )Good Luck