We can't have links posted to forums that support breeding.
One of our forum members has a chinchilla forum that offers information:
THE WONDER OF CHINCHILLAS - Login.
As for the wheel, if she'll use the cheap, plastic wheel, then she'll use a chin spin. They are the same except for materials and size. The flying saucer is the funny looking thing that some chins can't figure out how to use. A wheel is a good investment, particularly if the cage isn't large.
Cages should be made out of indestructible materials. Plastic is NOT a good choice. Chins are chewers, much more so than guinea pigs. Most things made out of plastic get destroyed very quickly and ingesting plastic is not good for chins.
Mazuri is a good brand of chinchilla food. Don't forget that chins are really NOT fresh veggie eaters, like guinea pigs. They eat more things like uncooked oatmeal oats and unsweetened shredded wheat (for treats.) One raisin a day is plenty. They also need unlimited grass hay to help with their teeth and digestion.
They should also have plenty of chew toys both for their teeth and to keep them from getting bored.
Chin cages should be taller than they are wide. Chins like to jump and climb, rather than run around. Check out the "Other pets" section of the forum; there is a thread in there about cages for chinchillas and the modifications you'd need to make in order to use a C&C cage for them.
As for social needs, almost all animals do better if they have a same species cage mate. Yes, chinchillas may be territorial, especially if they've been housed alone for extended periods of time, but, like guinea pigs, if you introduce them on neutral territory, then they can usually sort out their differences.
If people are advertising chinchillas as needing to live alone, particularly if there are multiple listings of this nature from the same place, I'd question whether or not these people truly know much about chinchillas. chinchillas are like guinea pigs, they live in family groups.
While the modern day pet chinchilla may not exist without the fur trade, continuing to breed animals for the sake of fashion, no matter how "nice" their lives are, is despicable.
ETA: here's the link on the thread about C&C cages for chinchillas:
https://www.guineapigcages.com/forum/others/19932-important-information-chinchillas.html.
Also, it can be very hard to find chinchillas for adoption. I would not, however, recommend going to a breeder to get a friend for your chin. The social needs of the chinchilla are important, but I believe it's also important to keep the population under control. If people continue to support chinchilla breeders, then soon, the chinchilla population will be as out of control as the guinea pig population. It might even be worse, considering that chinchillas live twice as long. Until you can find another chinchilla for adoption (and you found one; I have no doubt you'll stumble across another

), just play with your chinchilla a lot and give her lots of toys to stimulate her and keep her from being bored.