The mechanical company I used to work for was investing in the grow industry pretty heavy. It’s all cash based around here with banks not willing to loan, yet. The company would finance the mechanical equipment and installation for the operation with a higher % rate than normal, 35-40%. These were short term loans, typically 12-18 months and were often paid back ahead of schedule. With permitting and ordering the equipment often the loan was paid as the start-up/commissioning mechanic was leaving the building.
I have two friends that are well out of the city and they’ve put up pole buildings on their property that are rented to growers. One is a commercial nursery and you’d never know what’s going on in the buildings out back, hardly any daily traffic. The other dude has his lil hot rod shop and a couple “storage” buildings on what looks like farmland, last I checked his income was only the rent off the two buildings.
Money to be made if you have the money to front.