sealed grow design

Hello everyone! Im about to start an ambitious Build for a grow box, I'd love to hear if anyone has any input on its feasibility or any modifications that could improve it! For a while I used to grow in a grow tent, it served its purpose but was painfully obvious what it was, and annoyingly loud...

okay guys i have torn my drop ceiling out the basement and the old drywall out after a flood. it is being re-purposed as an expanding grow room. meaning i am starting with 4x8 canopy but one day would like it to be 8x8 and the other side for veg. anyway i keep going in circles on some things...