I disagree with SAM, it doesn't need to be a full time job, in fact, I think it should never be a full time job. These are PLANTS, they're not animals that require daily observation at minimum, they can do just fine being ignored for a time (guerilla grows, anyone? How's that work?).
Also, can you menfolk PLEASE stop with the fucking misogyny?! Jesus Jumping Christ, so some of you are idiot enough to hook up, often repeatedly, with the crazy bitches or the women who have no boundaries. That doesn't make ALL women snitchin' bitches, it just makes your choices in women bitches. Learn how to choose a partner that suits you or how to row alone and don't complain so much about it as though you "know" all women so intimately. You don't.
What you plan? Not legal. Growing plants isn't illegal, but moving from that to making a living? Illegal. I can also guarantee you that cash cropping is not a way to make a living, legal or otherwise.