- For the branches, you can use the benchmark of your own city: e.g. in my hometown with 500k people I have 1 branch per district. And I can make an assumption about the # of people living in a district (# of buildings and # of apartments).
- Then you make an assumption about cities / rural population and apply less density in rural areas
- Make assumptions about HQ - e.g. nationalized banks are usually inefficient and for every 5 employees in fields there is 1 in HQ