the OP contradicted himself saying it was rather easy and then saying its not. you cant make a living off a couple pounds a month anyways if you calculate in your expenses. i agree with racerboy. there is a big difference between making a few extra bucks and being able to pay your light bill, nutes, rent, ect, from just growing. and with so many people doing it.. you have to be as good or better than the competition if you want to make anything extra. there are few people getting "rich" off of it IMO
well it is easy once you're established and its just plug and play and sell.
its hard to just say ok im gonna do this and start from nothing and learning as you go and rolling the dice. so many people try and either they do ignorant things like stealing electricity. telling too many ppl about their grows...getting robbed when they finally sell it etc.
in the purest form it sounds simple (grow plants. wait till weed comes. cut it down. sell it for $$$) but when you break it down and have several lights, and a/c, fans, learning about nutes and what to use and what strains grow which ways and learning whats your most valuable strains to sell, how to sell without getting robbed/arrested etc.
its not easy thats why people burn down their grow spots or get raided etc.
it takes a big commitment and a LOAD of money/time.
many just assume you just "toss some seeds in the dirt" and sell bud like its selling bottled water.
I know friends who tried things like that. ended up in jail and one guy got his own immediate family member murdered during a home invasion (he talked too much and someone found out etc). the mj business is much different from the mj lifestyle. there may be this "hippie" stereotype stoners have but those in the business (some growers and many middle men and robbers/jackers) can be much different and much more ruthless/violent.
So its easy if your in my position (growing for half a decade and already went through all the rookie mistakes etc) but to someone who just smokes a lot and grown maybe a couple plants for themselves may not be ready for it from a business standpoint.