Five acres is a big plot. That's awesome. If I had 5 acres, I would break it up into 4 different plots. Deer like a variety, and that would give you the ability to try a host of things to find out what they like best.
Has the land been farmed/tilled before? If so, then the soil might be right. If not, it might require more nutrients or lime. GET A SOIL SAMPLE -- sorry for screaming, but that gets missed by so many people. They then grow junk and say to themselves, "guess I'm no farmer."
First step, decide what you want to plant. I would try a clover plot (this is a perennial, and it will come back with a little maintenance), winter wheat and rye plot, a brassica plot (rape and turnip), and a then I'd pick an experimental plot. The second step is to take the soil sample. If you are growing 4 different varieties, you need 4 samples (one from each plot). On this sample, you will need to tell them what you plan to grow. When you get the soil sample back, it will tell you exactly what you need to add.
You can't really determine the cost until you figure out what you want to plant and what needs to be added to the soil in order to plant it.
Hope this helps.