I mean most families don't need more than one car, but some people like to buy lots of them.

I grew up rural and it was very rare to see a farm with more than five guns, most would never "need" more than two. If someone registers and properly stores a large collection through legal channels then I have trouble taking issue with it regardless of their location. Most rifle ranges are in or near cities and even if you were aiming for a single arm per modern calibre, you are talking about dozens of guns.