what's a average cost to add a additional room or restroom?

For example, clear pathways, restrooms and showers, beds, and so on.

He tells me his partner in crime would meet for lunch at a restaurant, leave his jacket with an envelope with $20K or more in it, go to the restroom, and come back to see the banker would sell him the $200K property for $100K.

However, I’m not sure how comfortable people will be having to share restrooms like that.

Mobile Home Park includes the 1.6 acre lot, 7mobile homes (fully rented with leases and deposits), laundry room - currently inactive (with restroom, 2 coin washers, 2 coin dryers)The asking price for this Mobile Home Park is $189,000.

SF STR's are nothing like hotels; they have no parking lots, they don't have hundreds of strangers staying together in different rooms, they don't have onsite 24/7 staff performing housekeeping, front desk or maintenance, they don't have bars, restaurants, common areas, public restrooms or meeting spaces located on site, hotels are commercial structures designed to house hundreds or even thousands of people under one roof. 

You live in the basement, which is a separate and distinct dwelling unit (i.e. its own kitchen and rest room). 

Morbidly obese individuals have a difficult time in the restroom.

I bought my first condo near my work and rent my rest room out for help paying my mortgage.

Kitchen and rest rooms and live in ready.Second property:$152,000 asking back on market, 40 days on market1,600 sqft19602 bedrooms 1 full bathroomThey did a cheap flip on the house (has new floor and paint), has foundation issues, the high schoo is next to the house so major traffic area, kitchen is not live in ready, no space for the fridge, need to change the wiring for washer and dryer since it's in the kitchen, the front and back door cement steps need to be torn down.