Money is def. a big factor for anyone I think; I mean, dang, who would have thought a pet that doesn't need a fence, vet visits, vaccines, registration, or toys could be so bloody expensive! I have 8 five-gallon tanks, a 10, and 30, and the filter cartriges alone make me cringe. Not to mention the medical expenses since I'm seeing that "rescued" fish brought back from the brink of death seem to end up with chronic issues. Blech. This is why I'm getting out of fish; as they die, I'm revamping the tanks for Madagascar Hissing Cockroaches B)