Did this, stated wanting only 2 silkies then decided on 3 plus got a free peanut packer with a total of 4 silkies now. Next year I am getting 3 more because I really want a blue, a black, and a partridge. Might get a blue partridge too just for fun. Currently have 2 buffs, a white, and a splash...
I would say if you are looking for a productive bird silkies are not the way to go. They are a cute pet but since they go broody so often you won't get many eggs from them a year like you do with the Jersey Giant and Australorp.