Things go right with temp control etc, you're barely going to be able to walk/crawl in there in several months. Be mindful on your grooming, but keep the idea of trees trapped inside an 8 foot ceiling in check. Without previous runs on whatever mix that really is, you'll have to gage response to topping and how aggressive you can break/LST in there. Topping with proper care is rarely an issue and will prevent you from having to do it later when they are touching the ceiling in there.
Also have to watch for burn as they grab those plastic walls. Mixed effect problem. Direct tissue damage of course, but also disease vector from necrotic materials and exaggerated transpiration rates to the affected limbs.
Cheers,