Sounds like you only want to rent it for a short time. Here, 10 dollars per month for a cow-calf pair is pretty much normal. Renting for the year, you can get it alot cheaper than that. If there has been plenty of rain and there is plenty of grass where you are, there may not be anyone interested in just renting for a couple of months in the spring. You will just have to advertise and see if anyone is interested in paying anything.