Yeah what Tunda said. You can have a 400 going 24/7 flowering 2 sets of plants switching them in and out, and also have a few vegging that stay with the light 24/7. A mother plant, some fluoros, and a cloning kit (or some jiffy pots and large clear party cups) and you're all set. 6oz a month off a 400 in soil easy. And 1500 a fortnight is only 39k a year (gross?) I think maybe Total Head thought you meant after tax or weekly or something.