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> Um, so how does not having a facility, which is probably required to give care

It's required for certain levels of care, but not every encounter requires those.

Well, if you build a clinic it needs to be wheelchair accessible, and have access to parking for all the patients that might be present at one time, for example. If you visit patients then they either live somewhere accessible or not and you just need to get one car to their place.

Same way a taco truck is cheaper to operate than a sit down restaurant. You still have to follow the local health codes but your fixed costs would be less.