I have a client which is a Mobile Vet (visits clients at their homes) and currently has 3 location but plans to grow fast by hiring new specialists in different cities and covering the whole UK. Should I create a listing for his main location and add the new cities as additional locations in GMB? And in that case maybe use the main domain in his GMB pages or create different Local landing pages for each city? All addresses should be hidden because they visit their clients at their addresses only. I am curious to see how you would handle this one.