I got three dumb questions for you today

Hi All, I got three dumb questions for you today.I`ve just got my GMB verified and will start creating citations next. I`ve got my business listed in the capital city of Johannesburg, South Africa.I rank organically across all major cities and provinces in SA. So my goal is to ultimately have a GMB listed in 3 of our major provinces (although the one will do for now).So my questions are:1) When creating the initial citations should I enter the address as only the address corresponding to the existing GMB?2) If/When I get the GMB listing for other cities, do I simply duplicate all existing citations with a new address, or do I need to update all existing citations to include the new city?3) Should I go with Bright Local / Citation Builder Pro / Whitespark / Fiverr ?Thanks a ton!