That's great. I hope you get some young ones from a breeder that you can tame well. I've had a chinchilla that was put to sleep last year that was basically a rescue chin from a pet store whose owners didn't know how to care for him. He was a year old and had dental problems. He was not very tame although he was slowly improving to the end but with a lot of work. My new chinchilla is about 1.5 years old. I got him from a reputable breeder at 3 months and he is unusually tame now and was very easy to work with.
I used to think the same thing about the hiding place but my current pet does great without one. What I've learned is that some chinchillas like to hide and sleep in a wooden house and are less stressed. For an older chinchilla that is not very tame and easily frightened I think it is good for them. For a young chinchilla that has a calm disposition I think it is easier to tame if you don't have a place where it can hide from you. In my experience putting a wooden house in a chinchilla's cage can make it very territorial until you remove it, but it will depend on the individual. I have also used a chinchilla hammock in one cage but my pet didn't use it very much. Some chins really like them though so again it depends on the animal. When using cloth items be careful that your pets don't chew or shred them. It can be dangerous for them if they get tangled in it or if they eat it there is a danger of bowel obstructions. Most chinchillas won't do that but just check the cage daily for signs of that if you have hammocks.
The most important thing for your chinchillas is going to be appropriate shelving. They need to be able to jump inside their cage and sleep on the solid shelves.
