Need expert's help with exhaust configuration !!!!

Thanks for your help guys , Im really thingking of getting a minisplit in next month and for this month i think im gonna bring the portable a/cs i got off kiijiji back home and get 2 x 10-12btu windows a/cs and modify them as so http://www.youtube.com/watch?v=JI3rviFUK-k and instal them like this .
So in the end , i wont need to filer the a/c exhaust's and wont have to waist any space in the tent since there going to be on a rack out side the tents and will only push air in the tents ! i have 36 plants in big mfking pots in each tent so i have absolutly no walking space or spare room.

And im thinking of setting the veg tent like this to lower inline noise and ducting running around the place