@mwp051699
You are severely underestimating the cost of Critter Nation cages outside of the USA. It costs a lot of money for a non-USA resident to buy a Critter Nation cage, probably double whatever the initial USA cost is.
@JesusFreeman
Honestly, I think it's admirable whenever someone can build a cage for themselves like that. Unfortunately, I don't have that level of technical skill. But it is a good idea for people who can. I once wrapped a ferret cage in chicken wire with some help though, and that was a great cage for a time....
@SQ
Thank you for the links! I've ordered some of the space pods and tubes to hopefully give them something interesting. The drainage pipe is really interesting, I'm going to keep that in mind for when we all get out of quarantine and it's easier to ask for specific requests. Your cage is so beautiful!