Im sure that if you spend enough money on the fans/blowers.... and you will need a blower for that thing in a small cab.... the biggest cabs ive found are only 2 feet deep... hell my 400 watt covers a 3x3 no problem.... I have been checking out some huts and stuff and just cant make my mind up.... Ill be posting a new thread about different rooms...
bottom line.... we need more info to help.... if you have to keep it low key and small like a cab like mine or a double like FMJ's then i would recommend selling that 1000 watt
if you can go not only 7 feet high.. but 7 feet wide... and deep... then you got something going....
after i finish my current crop ill be changing my cab into just a vegging cab with an experimental flowering room up top... and then just get something bigger for my 400 watt... hell 3x3...i bet i can grow a 4x4 no prob with it... good luck and