So what exactly would you like to know?
I could go on all day with how, what, which, how many I have and want, and all the mistakes I've made along the way.
If your familiar with lake Malawi Cichlids your most of the way there already..
Absolute Minimum tank size for most all Peacocks is 50gal but I strongly recommend a 75gal or larger.
Same basic tank set up but with less rock work and more open spaces.
If you plan to have any females at all you will have to stick to one type as the females almost all look alike and interbreeding is highly likely leaving you with unsaleable hybrids.
If you want an all male show tank then you can keep one of each type, keeping coloring's as different as you can up to stocking lvl of your tank.
Malawi Peacock Profiles Some get along better than others but few are very aggressive towards any but a similarly colored or male of their own kind.
You don't stock Auloncara as heavily as Mbuna normally. But still want a high gph turnover from your filter as they are large and produce a fair amount of waste.
That's the short abridged version, they are a great, mostly active, colorful (except the drab females) fish, I Absolutely love em.
This picture has a German red, A Benga Yellow and just the tail of a Jacobfreibergi "Eureka" all juvenile in this picture, much more colored and finned out now.