Training is always a wonderful option! If you need any help with LST feel free to PM me. I use pipe cleaners and they work wonders honestly. Safe and effecient so far!Sadly this is the best option since its two locked doors, everything else is being used or isn't considered two locked doors since the one room id use is a high volume traffic area.
I also don't have the money to buy a bigger one right now. I figure though, I can train the plants to stay lower