My sister has a freshwater tank
and she went from 3 cherry barbs to about 30 and they keep spawning and making babies
im looking to get her a used tank bigger for them and also sell some
I'd look for a tank for her here in the for sale forum as many aren't reef-ready tanks and she will probably get the best deal here
As far as the fish, hopefully someone here might be interested in some of them and contact you, or she might take them to a LFS and trade them for a credit or some other types of fish or food or something