I ordered and read the book Cecil recommended, it was definately informative. I was going to pick up Tilapia last week, but a trip to the vet for an injured dog sucked up my disposable cash. Maybe next month, if he still has some.
Here are my near term plans. I am going to start putting together a materials and costs list to build the system. First I will start off with the recirc system itself, then I'll start looking at the climate control portion. A heater from a hottub might work, if I can get it dialed down low enough to not give me Tilapia soup! Even if I can't get the fish this year, there is always next year. My intent is to grow them during the summer, then keep a few over the winter. This way they would be mature adults in the spring and start spawning right away. I'll keep everyone up to date, and I would recommend the book Cecil mentioned earlier, a great resource not only for tilapia, but other fish as well.
BTW, does anyone know how long Tilapia live if kept at the correct temperature?