even if you did frogs you would have to do a lot of maintanence. bullfrogs require a lot of water. their cage will have to be large because of their jumping abilities. a better choice would be a toad (american or southern) cause of their mainly land lifestyle only going to large amounts of water to breed. even if you get them to breed i think this will be a once a yr thing. you would need to have mature adults. you need to fatten them up. you need a warm and cool season. its a lot of work. what are you gonna do with hundreds if not thousands of toadlets? the amount of food you would need!!!!!!
for your aro i think you are better off sticking with pellet and stick foods. an occasional frog here and there as a treat (watch for parasites, maybe freeze them first). i would stick to shiners or some kind of other fish for feeders (not goldfish or fatheads). but go in the arowana forum and get some suggestions. im sure you will be told to stick to dry pellet type foods. market shrimp and other tasty meaty products from your seafood place would be good too. (like catfish, frog legs, tiliapia)
you might have better luck breeding rats and mice for your aro. im not sure how aros do with the fur and stuff though if it were its main diet. check into it though. definately easier and faster to breed them.