Test print at A0, run off on the large format digital printer. Big enough that holding it up hides everything but your ankles. The layered ground swallows the room and the red letters sit on top of it like they were pasted there.
The blocks are cut by hand; the street needs scale, and this is how a one-person campaign gets it. The size is right. A street poster should be seen from a bus.
Part of The Palace Is a Refuge.