has anybody ever rised catfish in a barrel???this is one of the wife's ideals I think she read about it a couple years ago,we now have a couple plastic barrels & a pump with tubing this isn't a joke
I know of folks raising Talapia in the desert in tanks.Small like cattle water tanks.
How about this guy I read of raising Cherries in desert.He wrapped burlap around trunk,packed dry ice for 2 weeks or somesuch and trees thought they had a freeze and produced!
Point being,I think your idea sounds great,keep your water cool enough for cats,and feed em catfish chow,LOL,and should be doable.
Outside the box thinking,lot to be said for it,we do a lot of that here,seen some great ideas and they work,like the bean flour experiments and dehydrating frozen store bought veggies are a couple coming off the top of my head ,there are others too.
So do it,and dont forget pictures,we love pictorials here on projects.
"Make it your ambition to lead a quiet life, to mind your own business, and to work with your hands, just as we told you, so that your daily life may win the respect of outsiders and so that you will not be dependent on anybody."