Can you imagine what a great treatment room a large master bath is (all things considered)?
All of the plumbing and scalding hot water, the great surfaces and porcelain, and a shower and toilet, and a separate bathtub that could be made into a bed with a waterproof mattress that could be hosed off with the hand sprayer, great electrical outlets for a TV and radio, good lighting, an individual space heater, even an exhaust fan for a smidgin of air suction.
With some plastic sheeting, duct tape and some medical supplies, the parent who had that would have a pretty good working space for a family member, there is even a lock on the door to keep out the little kids.
You would need to shut down central air.