I work in data science at Freddie Mac where my team crunches a lot of mortgage data for machine learning, data mining, and data visualization. 

In general, a physical or mental impairment includes hearing, mobility and visual impairments, chronic alcoholism, chronic mental illness, AIDS, AIDS Related Complex, and mental retardation that substantially limits one or more major life activities.

I nodded along with much of it and you helped me visualize actions I had been pondering.

See the wall that comes out from the right - simply extend it across to the left and put a door in it.It would look normal, visually, and then everyone could use that storage closet under the stairs - perfect place to store winter clothes and stuff, X-mas decorations, etc.A non-load-bearing partition wall with a door in it to the downstairs "bedroom" should be pretty cheap. 

Tenant stipulates, represents, and warrants that Tenant has visually examined the Premises, and that it is, at the time of this Lease, in good order, repair, and in a safe, clean, and habitable condition.

have a physical or mental disability that substantially limits one or more major life activities—including, but not limited to, hearing, mobility and visual impairments; chronic alcoholism (but only if it is being addressed through a recovery program); mental illness; mental retardation; being HIV-positive, having AIDS or AIDS-Related Complex

For instance, I am replacing a heater filter today in one of mine - when I do this I will also conduct a visual inspection of all plumbing and electrical as a courtesy to my tenant.

I appreciate you adding links for me to visualize these things.

Most of the bids were not very specific in the type of finish materials they would use (I assume finish materials mean the "cosmetic" stuff the ADU renter would see visually such as tiles and flooring). 

No one is an inexhaustible tower of power that can just shrug off one failure after another with some positive visualization and good vibes.