Ferret nations are the most popular cages for chinchillas. Generally doubles but a single level is fine for 1 chin if you are pressed for cash. Usually people replace the plastic floor pan with metal ones from bass equipment, the plastic shelf with pine board shelves, and don't use the ramps. You can though just wrap the plastic pans with fleece and use that as both an anti pan chewing system and all the bedding they need. Chins and plastic do not go together. Most any other cage will be nearly as expensive with less space and more plastic.
