Its all relative really, I would classify neon's as easy to breed, but hard to raise the babies, the fry are very hard to feed the therefore raise.. Well I guess they're not that hard to raise if you follow the instructions and have green water etc but to me its alot of effort..
To me african cichlids are very easy to breed and raise and sell, the mother looks after the babies until they can swim and eat they come out big and can if you want them too eat flake straight away! They dont require alot of water changes when they're young and they're certainly not fussy or sensitive (have stripped week old egg's and bagged them and sent them away and not one of them died) Thats easy in my books! I think its relative really, best best is to decide what fish suit your sizes and numbers of tanks and give some a go if you dont find them easy..