Fancy
A 125 gallon aquarium or bigger with all the goodies for the breeders, a couple of 29 gallon aquariums nearby (for multiple births), a small greenhouse or "cold frame" structure in your backyard with multiple small above ground pools or fiberglass tanks,
or
A back yard pond (or private lake). Just remember: temperature is where it's at. You must be able to keep it above 60 degrees, which means you may have to use a pond heater in the winter.
I built a 24 x 50 feet "cold frame" in my backyard. In it I have six 500 gallon pools, one 400 gallon pool, and a 5000 gallon tank. (for the 2 pounders ;~)
The added benefit of the greenhouse is that you can also grow vegetables in it, and feed them fish dookie instead of cow manure. My tomatoes love it.
But wait, that's not all! how about the...
Big Time!
Supersize that fancy one please!
With as little as an acre of land and multiple sets of breeders you can set up a small commercial facility and market your Tilapia to or sell at : Farmer's Markets, Hispanic, Caribbean, Oriental markets or restaurants.
Umm, umm, umm, Love That Fish!!
How big or how small. It's all in your head.
OK, enough about the hardware for now, how about the software? Tilapia Farming Basics is the next stop.