Colorado has the 6 plant law too. Hasn’t impeded them any. Spawned a bit of a cottage industry for non-pot roommates, gives a house more people so you can grow more plants. Sounds like the licensing and city regs are what got in the way.
There’s two pot stores within walking distance of my house, and THREE converted warehouses for growers.
The parking lots at the stores are almost always empty when I go by.