They are pretty expensive. As an adult they need a minimum of a 40 Gallon Breeder tank or equivalent size cage, UV lighting which must be replaced every six months (if fluorescent) or yearly (if mercury vapor), and they will eat between 500-1000 feeders weekly while they are growing. Adults eat more greens than bugs, so they are a little less expensive to maintain, but they will eat you out of house and home during the first year or so. They are great pets, but they are also a much bigger financial commitment than a Leo.