IMHO, when the supply starts to match demand, and the price settles down to it’s most profitable (to the government) price, that price will lie somewhere between what each of you is forecasting. Please see my post #66, for one reason I think this.
People will need land, or spare indoor space to grow their own — many people don’t have ready access to these essentials. People making lots of money will be more likely to buy than grow. The less money you have, the more likely you are to grow your own (and the less likely to have the land or space to do so). And so on. A market is able to crunch a limitless number of factors down into a single figure — the price. That price will be considerably higher than Beagle8U predicts; and considerably less than Ken H predicts.
Did you miss the part where I said...totally legal and unregulated?
Make it as legal and unregulated to grow and sell as tomatoes are and re-crunch your numbers. I think you would find that an ounce of pot would fall to the $5 or less price range.