1. 30 weeks (7.5 MONTHS) = 2-3 ounces. How long can you make 2-3 ounces last? I daresay not 3/4th of a year. Even by staggering growth cycles you are still only talking about a little less than 2-3 oz PER month. And thats assuming your plant doesn't get fertalized, chem burned by too much nutrient or toasted by the light or any other number of potential problems. Not that i would know anything about any of this. pure conjecture, mind you.
2. 2-3 ounces of purple kush wouldn't last 1 month. You do the math.
3. How expensive is this super hydro equipment? I can make 200 gallons of wine a year with expensive equipment too.. OR, I can go down the street and buy a 8-12 dollar bottle. Again, convenience.
4. Black market weed would get you the same criminal repercussions that we see now. Notice that I posted a link to even Old timers making illegal hootch do in fact get busted.
5. You assume that every schmoe with a checkbook will be pumping out nuggets the likes of which snoop dog writes songs about. I would suggest otherwise. While not rocket science, most people probably cant tell the difference between the male and female plant any more than they know what the hell a hydrometer is.
Replying to the numbers:
1 and 2: Not that I know
, but even the heaviest smoker can take down maybe quarter of headies a week. So an ounce of purple kush would last exactly 1 month. If you can make 2-3 a month, then you can give away or sell the other 2 and pay for your equipment in a month or two.
3: A person can buy a grow box for a grand or two, and make their money back within a year. You may be able to make 200 gallons of wine a year, but it's not going to be $200 bottle quality. Someone could grow premium weed with much less effort than making premium wine.
4. There's no way to regulate weed growing to the level that you are expecting. Most grow ops get busted because someone comes upon them or smells them and turns them in. If weed is legal, then there's no reason for a neighbor to snitch cause they don't know if it's a licensed dealer or not.
5. Most people don't want to take the risk, so they have no reason to know the specifics of growing. Make it legal to grow and everyone with the money, time, and motivation will be growing.
I disagree. Just because we call it a weed and it grows naturally in rural areas doesn't make it the same type of plant that is smoked for a high quality buzz. In fact, How much space do you think it takes to dry out even 10 plants? How expensive the light source? If legal, all those neat little seeds of varient strains would become as rare as the recipe for coca-cola. How are you going to acquire seeds that Bong Load, inc has the market cornered on?
A good amount of mids and schwag (low quality) is grown in our national parks and on farms. If someone can throw out a handful of seeds and get a couple of pounds in a month or two, then they can easily sell that at half price of the government's weed.
Not that much space is needed to cure 10 plants. A string around a bedroom could easily do the job.
The light sources are cheap. I might know someone who bought a 30 dollar lamp at HomeDepot and got an ounce of AK47 (high quality)
The seed industry is very simple to manage, and would be easier if legalized in America. Seed banks exist in countries like canada, where the seed bank company may even loan out seeds to growers in return for hybrid sub-species. There were less types of alcohol during prohibition. Same with weed. We'd see an explosion in the quality and quantity of good buds if everyone could freely share seeds. It costs over 100 dollars for 10 seeds from canada right now. All of those seeds are guaranteed females (not sure how they know). If one company had a monopoly on the seed industry, then you would be correct, but in fact there are many many companies that bank huge quantities of seeds. Just open a HighTimes sometime and you'll know what I mean.
and, according to my compromise, you'd be risking your liberty to legally smoke and face criminal production and distribution charges just like the old man slinging apply flavoured spirits above.
It wouldn't be that hard to mimic the government packages. Weed gets dry if left to air out, so the government would likely have to distribute in medicine bottles or resealable bags. Why not just put the illegal weed in those?
PS: I had some apple flavored moonshine a few months ago. Maybe the same person
edit: Holy Crap!!!! I actually have tasted that moon-shine before. I have some friends in Mount Pleasant that had some brown moon-shine that tasted like apples a few months ago. Sucks that he got arrested, but they said he would only get a "slap on the wrists". If that's the punishment for homemade weed, then my prediction will hold more than true.
ha!
uh... no. 
