My idea: in addition to shared laundry facilities in the basement, what if I also set up a small shared gym (a treadmill/ bike/ rower/yoga area, etc) and a flat screen TV or two and maybe a sofa?

We wear thrift store clothes with paint and caulk stains all over them.

I also spend time listening the the podcasts and I really enjoy the content.By family trade I was to be a third generation clothing store owner.

Floors weren't at all visible due to the level of clothing, pop cans, used kleenexes, and other garbage.Now that hoarding is considered a mental illness I want to tread accordingly. 

You can have a one bedroom house with 12 bathrooms, you're still only going to have 2 people crapping and showering in those 12 bathrooms and washing their clothes in that laundry room.

At under 2x net, the resident has under $1,200/mo to live on...for utilities, car, gas, insurance, maintenance, tolls, groceries, medical, household items, clothing, electronics, social, etc. 

I did think it was possible but I’m positive that my tenant is allowing his 10 year old son do the laundry and overload it with comforter blankets and clothes both at the same time :( Plus he does laundry every single day.

He is the first tenant in my newly -remodeled SFH with all new appliances. 1st month, he let me know that the closet shelves fell down when he hung up his clothes so he went to Home Depot and purchased materials to fix them.

The vent on the wall is simply to get some of the heat (and smoke) out; it's not required but that closet may get hot and damaged clothes (or not...).   

I can't recommend the center agitator models they can damage clothes the vendor replaced that washer with the non center agitator model.