raising my own shrimp question

[kuatto]

Has anyone ever tried to raise shrimp in large groups?Is it worth the effert and what types are best suited for this?Was thinking I might setup something specifically for shrimp and offer up for trade any of the offspring,any thoughts?
Got to thinking back when i had fresh with crayfish caught locally(had 20 adults)that bred for me quite readly.(just another one of my crazy ideas )

Jim