Mine love their zoozone, but of course the bottom isn't see through. You could see them easily on your dest though. Mine was £30 ish pounds new so not too bad.
You can see my set up, they have a shelf from a mini duna (when The Cloud's home needed to be modified for his retirement) in there for an extra level, the shelf isn't as wide as the ZZ, so there is a long wooden bridge propping it up.
One wheel, one spinner, two sandpits open nest (under the shelf) little tent, climbing/gnawing frame, log (under the shelf) scattered food and a water bowl.
The tent was actually moved downstairs after Whizzbit came knocking on my door in the middle of the night having used Dasher sat in the tent to climb on and get out the top!!!! They have their water up the top now, and no way of escape!!
I think probably in total it would have been £50 ish for everything.