A conventional family home has a simple access model: the household, plus people they specifically invited. A home business breaks that. Clients arrive without being individually known, deliveries come to a residential address, suppliers call, and a steady flow of people has a legitimate reason to be standing at a front door or walking up a driveway during working hours.
None of that is a problem, and it is how a great many people here make a living. What it does mean is that the boundary between the trade and the household needs to actually exist. A client should be able to reach the workshop, the consulting room or the counter, and should have no route at all into the family's part of the building — and on a converted property that separation frequently was never designed, it just happened.
So the recurring job in Monte Vista is drawing that line properly. It usually means a lockable door between the business space and the house, a separate arrangement for stock or equipment, and a keying design that lets an employee open up in the morning without holding a key to the kitchen. That is master key system thinking applied at domestic scale.