Your address is the first decision. If you work from home, you do not have to publish the street address to be findable — showing the area is enough for search, and the exact address can go to the client once a booking is confirmed. That single setting is the difference between being discoverable and being visible to anybody browsing.
Set out what the client needs to provide before the first mobile appointment, in the service description rather than in a message on the day: somewhere to sit, access to water and a socket, parking, and whether pets need to be elsewhere. A wasted journey is worse than a no-show, because it costs the travel as well as the slot.
Charge for travel, either as a call-out fee or by restricting how far you go. Distance is the cost that quietly eats a mobile business, and clients accept a travel charge readily when it is stated up front.
Deposits matter more here than anywhere else. You are committing fuel and an hour of driving to an appointment you cannot refill from a waiting room, and a deposit is what makes a cancellation survivable.
Say plainly what your working hours are and enforce them. Working from home invites messages at eleven at night; the antidote is hours on your page, reminders doing the routine communication, and answering messages during the day rather than whenever they arrive.