You'll find me wearing jeans and a $9 black t-shirt from Target and I am not afraid to get my hands dirty, if I can fix something on the spot with what's in my toolbag before I call a contractor.Most tenants think that you are rich anyway, because why else would you own multiple houses?

That will work indefinitely, provided there isn't some black swan event where reservations come to a screeching halt. 

@Jeff Nash and @Stanley J Black can help

Again-- IF, THEN.You're missing the forest for the trees. 

You might be missing the forest for the tree.You wrote you have a good tenant who pays on time, but has a friend and smokes.

Stephen brings up a valid argument that there is no black-and-white clarity on 27.5 vs 39.

Plenty of black swans ahead, too. 

We discovered that all crawl space vents had been sealed, leading to severe moisture buildup, extensive mold, and damage—now also affecting our tenants’ health.We need guidance on:- Is the home still safe to live in after opening the vents and potentially disturbing black mold?

My initial thought (because I have a metal guy) was to just do black metal modern slates (see photos of the metal fence / gate style that I was thinking of below).

Our house is the green roof in the middle of the green forest.