Then, market on “rent by room” websites.

You can also charge more nightly for big amenities like a hot tub, game room, or things for kids. - Design: design goes hand-in-hand with amenities for maximizing revenue.

Tenant refuses to pay rent because ac won’t get room temperature below 64 degrees2.

If not, then ask that the boxes go in the middle of the room, so that the inspector has access to the walls (also if there is an active leak, the last thing you want is a bunch of cardboard boxes against the wall impeding air flow).An inspector will not move anything for the inspection and they will miss things because nothing is 100% no matter who does it. 

I have stayed in a few Airbnb places that were just a single room, but I have never rented out a single room in one of my places.

I got an estimate of nearly $2000 for part of 1 room.

Examine the projected rental income against the expense of converting the garage and possibly extra rooms.

Regarding the other things, this garage was a room before, so it has electricity and water as well because they had the laundry situated there to so, should be much easier.

So now we have conditioned when a person leverages self to the gill's, taken on mountains of debt and the grand some of there career is waiting tables or making coffee and some toilet-paper degree that a bajillion others also have, and maybe a few years experience at best. 

If you hired a painting contractor to paint a room, that MIGHT include them moving all the furniture, covering it etc to protect it.