I own a fence company in STX. Most of our sales come from commercial fence installations but we also have one crew that does ranch work exclusively. For a large scale project (3-5k lf or more), it's usually in the 2.50-3.00/lf price range. Anything smaller and your per lf price is going to start to go up.
Have no idea about that area but we stay booked 2-6 months out on ranch work, so call way sooner than you are gonna need it. We also require you to out a 25-50% deposit down to hold your place. Nothing is worse than the client who calls and has unrealistic expectations that you are gonna show up within the next couple of weeks, then gets upset when you have to tell him otherwise.