When I was first getting into GTPs earlier this year, my chondro friend told me that there are lots of things we don't know about these creatures. So far we've figured out how to keep them alive, and how to get them to breed. That's about it. That's all we need to know right?
There are so many different ways to successfully keep chondros it seems. Many breeders will have different ways to go about it and they will have comparable/equal success using different methods. I personally find this unsettling.
One of the things you don't want to do is to keep them too hot. Keep the temperature on the hot side at about 85 and on the cool side at 80. Dip into the high 70's at night is okay.
I personally no longer spray my animals except for during shed cycles and sometimes after meals. I'd say straight 60-65% RH is good as well, and peak into 80-85% when in shed, allowing it to dry out in between sprayings. There are other ways to achieve RH, like a hefty sized water bowl. Many people do think that they need to be kept in very wet conditions, but I would wager that will do more harm than good.
Eco earth substrate would be fine, although IME they tend to dry out and get dusty down the road.
3x2x2 is plenty good, personally that's what my animals will be going into. However, many successes have come from considerably less than this purported norm.
My male is always wandering around, at times finds himself on the floor, but a chondro that is off-perch is telling you something IMO.
The More Complete Chondro is a pretty good book that's worth the money. It's an interesting read to those who are starting out with nice pictures but some keepers will tell you that they'd rather use it as cage substrate than an information extraction pool. Some of these people have more credentials than Greg Maxwell. Maxwell just happened to be a guy who wrote the book, he is just famous for the commodification of 'high-end designer' chondros. He is comparable to BP breeders who breed for colour, and if you go on his website and take a look at the recent breeding updates you will see what I mean.
I researched chondros for 4 years before I brought one home. Now, this had a lot to do with college/funding/timing issues but I am very glad that I did my homework. The last thing you want is to get one of these from a show on a whim, get stuck with a nice unstable WC that will drop dead on you the next week.
Read as much as you can, find a breeder in your area and bombard them with questions. If they are worthy of your time and money, they will be delighted to talk to you.