You can extract 15lbs of biomass in a $25 used beer keg using 15gal of ethanol. Possibly 3x to 5x that depending on potency.
You can get 80-85% of your solvent back if doing single pass & drip dry. Maybe 50% with 3 passes over fresh biomass.
You will need a still to keep up with that.
you can pick up a bain-marie style still for a couple of grand, or make one out of another keg for less than $200.
Edit: Meet my first production still. Her name is RSOsie. Second pic is of the parts I assembled from stuff I had lying around. First is in production a couple of weeks later. I think I was trying not to throw water down the drain already. I moved to an air cooled condenser later on.
Glacier tanks 50gal mash tun. 4500w water heater element. Beer keg. The pump wasn’t needed…but was used on her younger sister Connie
edit: that mixer bowl in the front is actually one of my favorite funnels. I don’t recall if it was outfitted with a 4" or 6" triclamp.