Really you dont lol we have 50 and the amount of babies you can get if they each lay 8 eggs and they all hatch is phenomenal not to mention the expense to heat and feed them every day twice a day.....and if 50% of them endup being normals they simply wont sell as everyone wants a morph poor normals are lovely!
Also on a slightly different not and this isnt to put you off but there are so many leopard gecko breeders cropping up that the market value of babies is dreaful thats why i wanna breed some rarer thinks like helmets, caves and barking geckos in the future.