Good luck man and yeah if you can get another T25 and have Ali make some custom sides like i talked about earlier to bolt the 2 cages together and then Lexel the seam, it would be awesome. I am going to ask Ali about it when i call her next month after i talk to Bob about drop shipping a RHP to them for Pat's cage. If they can do a custom 12 foot stand or maybe just put 2 6 foot stands together and lay down a sheet of 1 inch plywood on top, that would probably work great. Plus imagine a double sliding door 12 foot cage. Would be crazy.
I personally am fine with 18 inch height. If i was keeping something like a 16 or 18 foot mainland, i would want 2 foot height but for something like Caesar who i'm hoping tops out under 10 feet, the height is fine.