I have the 260 reptarium and my frilly is about 17 inches in length, she can climb on it without problems, but she doesn't like being visible on all sides. Being skittish by nature and having excellent eyesight has its drawbacks. I even used silk ivy plants to try and make it less visible for other animals and people, it didn't seem to help her. All animals are different so it may work if he's not super skittish. But I doubt with normal use and care the reptarium would tear. I really like the reptariums. I did find a nice use for them.. my aussie water dragons love it!
See for yourself..
1st pic is of my aussie water dragons in the reptarium.
2nd pic is my frilly in a 40 breeder tank.