I had big time complications, I changed the way I build out rooms because of it. Now on a 20'x20'x8' room I don't run any intake or exhaust. Just a co2 burner and when the lights are on I will leave the door open a couple times a day when the lights are on. It works great.
But on another room...
That picture disgusts me. I get angry just looking at it. I can only imagine the work involved in getting the plants to that point, and I am very sorry for your loss..
Maybe next year put up a greenhouse, or a hoop house, just so the plants wont be in plain view. People can assume what is inside...