Home Depot for flooring and bath fixtures, and a local building supply for dimensional lumber, windows and trim. 

Remove all rotted wood and replace with treated lumber.

@Dan DiCiaulaI've used my oscillating tool to cut of nailing and other flanges to make stock windows fit, used pressure-treated lumber to modify openings, and me and my Great Stuff foam are very tight.The problem is that you're handing off your property to a C-class tenant who is not going to be gentle on the windows.

My daughter chose clik together laminate from Lumber Liquidators for the upstairs of her place and now we're wondering about the formaldehyde levels and whether she should be involved in the lawsuits....

We went with the thickest mil thickness for the money from lumber liquidators (https://www.lumberliquidators....) at 5mil thickness it's very durable.

J Scott, $15,000 for your lumber package and labor seems very low to me.

I know many investors in our areas who bought their SFR/Condo buy/hold properties at the right time (Buyer Cycles I and II), are now unloading their properties because they made stupid equity, and are doing 10-31 exchanges into multi-family properties out of state.

That leaves Steel, concrete and lumber material costs.  

It’s better than when lumber was a lot higher.

If you look at the spreadsheet below,  the lower the "D" ratio, the higher the demand of homes in this school cluster and easier for the seller to unload their properties due to low inventory and high demand.