Compost tea ....
Personally, I have used it at home, and did it with miniature equipment like a bucket and fish tank air pump and stones.
Did not use any at all in south Oregon, since we did not have a "garden" there.
I read a lot of stuff that undermined the excitement of the compost tea bandwagon of years passed.
But what I can find on the stuff, seems to shed enough good light on it's use.
Never tried to market it. Would probably prefer just to recommend someone in that niche.
Compost ...
All the time.
And often for work. For lawn install, plantings and for surface. Even dug a planting hole once where half the hole for a big tree was in soil that had no compost, and the other half was where compost was on the surface for about 12 years.
The side that had compost, had improved soil structure down to about 8 to 10 inches from leaching of compounds.