The whole Plumbing thing is just for the house on the premises
it clearly says that the greenhouse must lay on the same plot of land as the residence with the plumbing that you live in. You don't have to live in the greenhouse lol. And It really isn't clear that no one can see it. It says out of ordinary public View.which in my understanding would be taking a ladder and looking over my fence or peeking into a window or like the other guy said using binoculars or a drone. I'm going to put up a greenhouse just to be safe. I still would like to know where the law is that says what I would be charged with if I grow under 5 plants Outdoors, even if I didn't have the medical card. The only laws I can find say in you have 5 plants or under, over 5 in it's only a civil penalty. Another question would be do they just fine you two hundred bucks and let you keep growing or do they confiscate your weed?
From the law
"Ordinary public view" means within the sight line with normal visual range of a person, unassisted by visual aids, from a public street or sidewalk adjacent to real property, or from within an adjacent property.