Latest update: boyfriend, who took the pictures, told me that the tank had a regulator that was going off while we were down there. It's probably carbon dioxide for the weed he isn't growing. Not a flammable solvent at any rate. The other tanks are probably for the brewing.
I'm happy, relatively speaking. Less unhappy than I was last night. The tenant is, as Spartana said, pretty much a random hoarder, probably with ADHD. His wife has schizophrenia. That's her stuff in the living room.
This guy has been whining about how poor they are, on disability, can't afford the rent (they are $1000+ under market) and he sure has a lot of expensive looking hobby shit. And two cars, one new.
I'm done landlording. Maybe roommates, but not again where I can't walk into the house any time I want.