If you're market is hot, you shouldn't have a problem unloading it quickly. 

I'm trying to find out if you can frame in between the piers with treated lumber, covered with treated plywood, add lathing, and then parge the addition and the rest of the house to blend in.

That way you can unload it quick if you have to or hold, basically you have many exits.

Unloading a marginally performing rental to free up some debt to buy a better property later.

He is 72, does quite well, owns a restaurant in town and has many properties including several in Rio de Janeiro and wants to unload some of his stuff as his children aren’t interested in REI.

I've been in your shoes before and have been able to unload deals to other investors, so if you go that route I could give you some names of buyers.

The bank does not want to be in the property business and will lose money to unload it.

Which although your current mortgage payment is slightly higher than your rental income, it is probably a wash because of the selling costs associated with unloading your rental.

find a small local kitchen cabinet supplier that only supplies cabinets or go to a local lumber yard and ask where apartments complex owners are buying the cabinets. 

The siding, lumber and trim work are generally better.