8 x 4 is not exactly a small loft. I think you can keep up to 12 pigeons in it, especially since you do intend to coop fly them. If you do decide to sell the young, and there is a market for pigeons in your close area, best to sell them as squeakers. More peeps will purchase those than mature pigeons, especially since these are not racing blood lines wanted for breeding.I have a very small loft, 8x4 feet