Improvised grow tent need advice

Started indoor cultivation 3 months ago with a 22x22x60; wood frame with 175 MH. Grew 1 auto seeds deisel berry and 1 DP white widow. Supplemented mh with 2 65 cfl and several smaller light bulb sized cfl. Yet to harvest but expect a zone from both combined.

Not my expectations....
Used MG organic soil and 30x30x30!lightly during veg and 2 doses of MG 15x30x15 lightly for bloom.

Now for the real question: I just improvised a larger tent made out of modular kitchen racks(industrial grade). (32" deep, 35.5" long, and 72" tall. Ordered 600w digital mh/hps dimmable digital ballast for new set up.

Seeing how I won't be adding walls I order 10x25 panda film for interior reflective, but these will sever as the walls; I won't be adding any other structure for support other than light bar. I also plan on adding a blanket for insulation followed by fire retardent tarps for further insulation. Going to use 11" 5 gallon round pots with fox farm frog soil.(ps what what be a good mix to incorporate with the ff to increase amount of product. I ordered 6 12qt bags. I know it's not enough for 50 gallons combined but is there a safe additive to add to increase the amount of product without substantial degradation.

Second question: how will I extract the heat from the bulb(the ballast has hook ups for intake and outtake. How will these be attached without compromising strength? Where also should the fresh air intakes be to maintain light proofness?

Lastly, how will I context the panda film to the metal pole of the structure? Should I wrap in circles and then just attach zipper entrances or should I cut into sections and then mount with duct tape and zip ties?

As for your soil, I always suggest a mix of 40% FFOF, 40% Happy Frog, 15% perlite and the last 5% a combo of worm castings/dolomite lime/blood meal and bone meal. with the exception of the Happy Frog you should be able to acquire those at home Depot/Lowes/Walmart. In place of Happy Frog, I suppose you could mix a blend of compost and garden soil from the same locations, although it wouldn't be quite the same.

As for your "tent", thats a tough one. Two sided tape from the paint dept at Lowes/HD would help with the mylar to post attachment, but I have no suggestion for the door/zipper problem.

I either going to wrap the panda film in a circular motion I six foot strips(like a candy cane), next cover in fleece for insulation, then finally warp in tarp for light, sound, and odor. I've also though of just wrapping it like a present in panda film and likewise with the tarp. Who knows, I'll measure twice and cut once

what at about fresh air intake and extractor? Will the vent from the light bring in fresh air or just heat, I have some cpu to act as intake and extraction. Show the be at top or bottom?

Lastly planning on 6 plants at a time. Will 600w do that?

ill post some pics tonight!