If a sim lives on a business lot, (Shop, Resturant, Vets etc) what do you do with their home lot?

i installed the live in business mod for my vet clinic and hired a vet but all he does is clean and doesnt treat any patients how do i get the vet to help me besides cleaning all i saw was craft medcine or dismiss is there a way with the mod or do i need to take the additional add on of add more patients off to keep from being overwhelmed i tried looking it up but cant find any answers