Will this cabinet design work?

I currently have a 4x4 tent with 2 air cooled 600 watt lights. I am now in the process of planning a cabinet so that i can do more of a perpetual grow. The deminsions i want to do are 5.5 ft length, 3 ft width, and 4 or 5 ft tall. I am limited in height so i would scrog the plants to keep them low. I want to use the cabinet as a veg space and the tent for flowering.

Could i get away with 2x 400 watt aircooled MHs in a cabinet with deminsions specified? I would probably have 3 or 4 exhaust vents on top pulling hot air out with 6 or 8 inch duct fans. Will this still be too hot you think? I live in a place with temps well below zero deg f for most of the year.

Hmmm whats the temp of ur house ditch ur two 400 go with 1 600 direct light hood dont worry about exhaust so much remeber its on ventilation it dont cool shit down only moves air around good luck ur brave soul

My house temp is currently 79 but in 2 months the outside temp will be below freezing.

Lol dam well if I were u I worry about a heater not ac ur plants should be fine hold of on the ac if I have auntil becomes a temp problem u should only have to get only one exhust fan for ventilation 6inch should do it I think thats just for vetaltion Im guessing