So I have a raccoon shaman who would like to set up semi-permanent watchers spirits in the sewer where he lives.
I know watchers don't count toward the bound spirit max, but can they be bound to a location?
The normal rule is net hits on summon equal hours the watcher lasts.

I can't seem to find anything in the core.

Any ideas?

IIRC you can expand Hours to Days by spending Karma permanently (1 Karma per Day)
but I'm not 100 % shure

with a slightly uncertain Dance
Medicineman

Or watcher summoning materials. 500 bucks