(Also, in the home I grew up in, I never had a private bathroom, nor did my parents. What kind of luxurious abode do you live in, and why do you assume that everyone has the same living conditions as you?)
This cardboard box living individual here has such terrible living conditions he longs to breath the air of commercial real estate. Does your bathroom have a stall? No right?
If you rent, your apartment comes with a private bathroom. If you have a roommate, at most one other person shares it with you. That's a pretty private bathroom. You ever been on line to use the bathroom before in the office? Do you think its fun to take a shit with 10 other people in the bathroom with you? lol
Stick a desk in the corner of your apartment and voila, home office.