Well all things considered, 1g/watt is doing well with horizontal High powered lighting.. so I'd hope you could do 1/2 that

I mean intake holes on the right side low, exhaust out the top left... I don't get how the box is situated that it would be seen

Under the bed? Ventilation may be an issue, and what if there are electrical problems? You don't wanna burn the place down lol make sure you know what you are doing and insulate/ground everything.

Theres plans to build a scrubber out there somewhere.. I can try and dig up pics of my old one to give you an idea