My thoughts are to put a ytong / aerated block section at the bottom containing chambers and then molding an out world over the top of that, alternatively as well just make the entire nest out of plaster of paris as it is to only be until they're large enough to move into an exo terra tank so I'm hoping to move them out just a little over a years time from starting. These species can't climb glass plus look amazing which is why I would like to keep them.
That's where I'm starting from with ideas. Any and all input or experience is more than welcomed. Thank you.