https://www.pcgamer.com/two-point-hospital-will-add-sandbox-mode-next-week-reveals-halloween-event/

Two Point Hospital debuts its Sandbox: Freeplay mode at TwitchCon today, which will roll out to all players next week. 

Marked as the "first in a line of planned Sandbox updates for Two Point Hospital", Sandbox: Freeplay lets players rename hospitals and unlock every option—which allows you to "make it rain", so tells the narrator below.