if facility were cities

[Spuzzum]

Yep, that's about right.

(Shameless plug: in my mod, I dropped the size of the remote miner components to 25kT (and likewise reduced their cost, effectiveness, etc.), so that you can fit them on the smallest satellite size. In vanilla SE4G, you have to develop the large satellites before you can use satellites to remote mine.)

You can only have one ship/base/sat remote mining per sector, but all remote mining components on that single vessel will work.