I work for General Atomics and Surefire Institute. This by no means is a source of income for me. I breed my own rats so I really just spend money on rat food and when I need to supplement, my buddy breeds about 100k rodents a year and I get them for cheap. I don't plan on holding back a lot. I have a cap I am sure but haven't found it yet. I will obviously move the ones not needed for projects simply because of the cost to hold back but I am not breeding at Random and in some cases not every year. I am breeding literally to achieve certain morphs.