Base building wont be a thing, Battle Brothers is a mercenary sim of sorts, a company of mercenaries…. of the traveling variety
Ye your probably right, we can go perhabs for the middle in that case.
Instead of owning your own base you can send your spare troops in “vaction”, by leaving them in a town, you are going to pay half wages in that case and if the town/village gets attacked your guys will also so make sure to find a safe place and to keep it clean aswell.
Some sort of bank is also a possible option , but i rather say no to it as it looks like you can carry all the stuff with yourself there’s no real disadvantage there, if you die there’s no use anyways in the stuff you carried with you ;)