About raiseing them from young and breading like a fishkeeping hobbie? as this site is for fishkeeping ! not bushcraft or ray mears lolWhat is the fun in that? Lol
This should be a fun little project.
Tilapia are raised in huge quantity in fish farm throughout the world. You can buy in every supermarket stores, frozen or fresh, and live ones from Chinatown for as low as $4 a pound. So it's not worth to raise in tanks for food. Besides, very few people can eat their pet fish. Dog are food in some cultures, but people rarely eat their pet dog, always someone else dog unless it is in famine.