Cool turtle. You could also go for a 100+ gallon stock tank. They are pretty easy to find at places like Tractor Supply company and other farm and hardware stores. The hatchery I used to work at has several snappers in tanks from about 60 gallon size up to a pair in a big stock tank (I can't remember the size, but it's somewhere in the 5-700 gallon range). They are great turtles, but not very nice, especially when they start to mature. One named ET was very docile for the first year or two after he was caught at about a 6" size. Now he's over 10" and pretty aggressive.
