Realistically I'd want to get a 70 gallon with a green terror, a 90 gallon with an oscar and a bichir, a 40 breeder with some axolotls, a 220 with a fahaka puffer, and a 120-180 community tank with some exotic plecos, schools of various tetras and barbs, kuhli and dojo loaches, red tail/albino shark, and all sorts of other community fish and if possible (assuming I get a larger 220 to 300) a black ghost knife fish (Depending on whether or not he'd get along with them)