theres definitely business to be had. legitimacy, im not so sure. federally, its still fully illegal to grow so theres always a risk of federal raids especially on large operations. (though they are supposed to have been halted) Places like humbolt are pretty much giant weed growing counties where its the norm to grow.
For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return