intake and exhausting 2 grow tents side by side

i have a huge room and i would like to try to put 2 grow tents side by side in the same room. the smaller tent is 32"w 60"L and 79"h. my wife got me a bigger one for christmas. 57x57x79. i have a 1000 air cooled glass sealed hps and a vortex 6" 449 cfm. i exhaust out the attic through attic vent. i own the house and im pretty handy with tool. anyone know how i would make this set up work.i was thinking about bring in air from the first floor. my room is on second. should i run outside air to both tents can i hook them together and make them work. for the small tent i have a 8 Tube 432 Watt Quantum BadBoy T5 Fluorescent Light . so heat wont be as bad. i will build or buy what ever i need to make it work. so please give ideas or diagram,

If you have a single room and it's big, why using the tents? If you build it, it will come!

I do it like this here,a 440 cfm eco fan and one 1000 hps ballast that flip flops between flowering both tents.I exhaust into the existing heating ductwork.

Nice tents, you could have them as clone stations and use the whole room to flower. I'd consider sealing it and adding CO2 whether your keeping the current setup or not. Also you can get a 4" PVC pipe through a wall intaking from the outdoor (get bugscreen) and independently duct each tent