Cattle breeding

Hi, I would like to know if someone has the experience about what I would like to do. I have 70 acres of land which I am thinking of building a kind of feedlot. Instead of being fattening cattle it would be for breeding purposes. I would like to know if this could be done, from your experience. I would build place to give the food daily to the animals and they are going to have all the rest of the land to just walk. I have 80 more acres that would be destined for the agricultural part, the grass, sugar cane and other types of food that I would be feeding my animals. How many breding cows can I have in this amount of land? Thanks