In this particular grow mate there is about 20ft of concrete and ballast above and all walls are about 2ft thick (reinforced concrete)...
Man if only I had these elements to my use.
Go for it full force. Have you looked into Heath Robinson grows?
I built a RDWC according to Heaths specs & have never looked backed.
Try making a mini RDWC just for trial Im sure youll love it your plants too.