Hey, so what i did today with my old savefile (230 months played) was
- killed all organizations except like 2 or 3 so they keep a low profile.
- Then i reduced my staff paycheck
- Pulled up the bills for governments so theres no orange triangle sign (support went to 39%)
- then i switched to my second screen and watched youtube for like half an hour and earned ~2k / month since i had all units and bases and you cannot sell them

Maybe i was lucky but i had no risk of scp break coming up and somehow no events popped and i could just chill while money went up

all the best! :)