Not spending money is a non-optional part of a general strike. During strikes you can't cross the picket line, and during general strikes the picket line is everywhere
Don't feel bad if there's an unavoidable expense, but just try to avoid consumption as much as possible. If there's anything you're going to need next week, stock up on it now
Sunbeam City is a anticapitalist, antifascist solarpunk instance that is run collectively.