, but I think the workforce housing model can be justified in that if you're providing folks in a C+ neighborhood a B- unit, do they need new countertops, or can they just be refinished or simply cleaned? 

The reasons to do renos are: things are in poor condition, will need repair in the very near future (easier to do when it is vacant), it will get you more rent, reduce turnover, rent it faster.You could have the cabinets refinished or paint them. 

I did a light oak color refinish with the hardwood floors. 

Did new LVP flooring throughout the house, new paint, and refinished the cabinets.

I have no idea how many times they have been refinished, but before my last tenant moved in I had the downstairs redone for about $1.75/sf, which was full sanding and three good coats of poly.

If you want to refinish the basement I would get three quotes on waterproofing from different companies.

Upgrades to wiring, interior paint, floor refinishing or replacement laminate and any value add extras not included.

I would leave near-mint condition carpet in a rental until it was used up and then remove and refinish the hardwoods. 

The floors were maple hardwood throughout, so they were refinished.

IF Corian/solid surface gets scratched, just sand to refinish with high grit paper.