I keep mine in a rack system over the winter mths in various sized RUB's or Contico boxes depending on their sizesubstrate is wood chips, or kitchen roll for the babies.
In the summer mths I use Viv's downstairs in the lounge where I can enjoy their antics in the late afternoon - find I miss lots of interesting stuff on the TV when they start lol. Adults are in 3ft x 15 x 2ft 2 viv stack whilst the babies are in 2 x 5 viv stack of about 18 x 18 x 1ft, have to use stoppers on the smaller viv's to cut off their escape routes, had a het albino female and my gloydi male do a runner this year! Adult vivs before I converted them for the hognose's