Perhaps a mountain horned dragon? Not sure about the specific care, but they seem to enjoy handling, and adults can be fed every few days. Definitely be sure to do more research into them, though. My brother had one and he loved his, and he was so friendly. I know the life expectancy is about five years, but Rango lived to be about ten. Care for them right, and they'll live longer. Rango lived in an 18x18x18 enclosure, but I'm sure an adult could probably live in a 30 gallon, especially if you plan to go bioactive.