That is a terrible way to use the render cows and it won't work. The cows don't function like this. Eon sells extra cows but it is a scam for it will never work with that many cows without some problem. You also can't start a cow a time and then add others. Imagine if you had to load 30 cows and wait for each texture to clear the network before adding another cow... It just doesn't make sense. Do you even use the software?