Nothing really special you have to do for a killie set-up. You must have a lid/hood on the tank because they like jumping.
As for setting up the 2ft tanks for breeding. Keep them bare bottom, it is easier to clean ans stops them laying eggs in the gravel. Only have one species breeding in a tank at a time, other wise they can cross breed. I would start with only one specie and keep the other 2ft tank free for raising fry in, or get more tanks :lol:. Breeding them is fairly easy, with some species requiring more work then others.
Groups that can live together;
Group 1 - note: Pseodepiplatys annulatus can get a bit nippy
Aphyosemion Australe
Aphyosemion Striatum
Aphyosemion Bitaeniatum
Poropanchax Normani OR Pseodepiplatys annulatus OR Epiplatys Dageti
Group 2 - note: Smaller Aphyosemion may be at risk from larger Fundulopanchax
Aphyosemion Australe
Aphyosemion Striatum
Aphyosemion Bitaeniatum
Fundulopanchax Nigerianus
Fundulopanchax Gardneri
Fundulopanchax Scheeli
Epiplatys Dageti