professional tattoo artist an house calls

ok, question on etiquette. an wanted to know from some professionals what they think of other professionals that will go to a clients house to do a session. theres a couple concerns here. one being if your professional an doing a house call you must be cutting the shop owner out of his cut. but with it if it IS the shop owner doing the house call? asuming he already knows propper sanitation an sterile procedures does anyone have a problem with that taking place?

whens the last time your doctor made a house call?