If you were to do a see of green with doing 1 gallon pots (6x6 inch square pots) and you used 4 - 4x8ft trays in the 8x8 tent you could have 250 plants in that tent alone. Depending on what type of setup you do, you can get 1 - 2 ounces per plant if you give them TONS of light. I would probably do 3 - 1000 watt HPS in the 8x8 minimum. depending on how tall you can let them get (if you have a resivor under them, you will lose 1.5 - 2ft of available height in a 6.5 ft tent). So depending on how tall they can get you should be able to get 1 - 2 ounces per plant on a perpetual harvest of 25 plants a week, so you would get 25 - 50 ounces a week from just your smaller tent if it was strictly used for flowering.
No offense meant, but if you don't know the answer to your own question, you really shouldn't be attempting a grow like that. That is a big garden to take on as a rookie..