Approximately how much should I pay to have a cyclone fence installed around 5000 sq. ft. of flat yard?

Question:10ft. tall fence. It's flat bare earth, 100x50, easy to dig into. There aren't any obstructions. I need one large swinging gate to let in vehicles. Thanks!

Answers:
Fence is not priced by the square foot. Contact some fence companies and let them look at the site. They will then be able to determine the lengths of each side, the number of end posts and line oosts needed, the size of the gates and digging conditions.
You can then select the exact type of fence materials you want and they can price it out.
Call 2 or 3 companies.