I am envisioning soft white sand substrate, varying sizes of rougher rocks stacked with Anubis plants growing out from between the rocks.
With this I am thinking a little group of neon/cardinal tetras, and some Amano shrimp. Active and personable.
I would suggest a nice male betta. Not a schooling fish but they can't be beat for tiny showy fish. I used to keep one with cherry barbs as well, and it never ate or bothered them, so could probably have both. I have heard of bettas eating neons and the like, but I think cherry barbs are too big to eat.
I forgot to mention mom's kinda tired of all the bettas I have and have had, plus she was keen on getting multiple of the things so I'll stick with that
Oh yeah, I forgot about that, I'll save the rams for later then
Apistogramma live in lower temps, right? how about a single agassizii or cacatuoides? or would they be too aggressive for the aphyosemion