Yes, yes, a CavyCages store! Most people get their small animals from pet stores because they don't know they can get them anywhere else. When you're in the average pet supply store and you say you want a Guinea pig or a hamster or whatever, they've got the cages, dishes, and supplies, too. So you go home with a "large" cage and your vitamins, yogurt drops, salt lick, "good" food with the seeds in it, and the dusty old hay. Then, maybe, if you're a really good pet owner and you want to do the best for your pet, maybe, MAYBE, you come across this site and learn what you should have done in the first place. (Unless you're lucky and you have a really good store with people who really know their stuff, and stock good products like Oxbow.)
Or, if you're like most people, you haven't a lick of curiosity in you, and you just keep doing what the pet store said to do until your piggie comes to the end of its short life in utter boredom and lonliness.
So, yeah, a nice CavyCages store, with large C&C cages full of piggies from the local shelters so people can see exactly how to house and care for them, and so the adoptable piggies have a chance of getting adopted. And lots of educational displays.
I reckon you'd have to have more than piggies, though. Rabbits. Ferrets. Chinchillas. They can all live in custom-built C&C cages.