@catgirl@lgbtqia.is something that helped money-wise was posting an instance announcement (Administration > Announcements) with info about my costs and asking people to help out

but moderating and maintaining this stuff can be really taxing, could be good to try find some more people to help with that (through those same announcements perhaps). Or worst case, giving advance notice that you will be shutting down, to give people time to migrate/export their stuff :>