Pig Housing

I have a shed which is 60 feet by 30 feet and a height of 13-15 feet with asbestos roofing and four turbo air ventilators on top. The shed has three doors and three windows (at 2 feet above floor level.The shed has no colums in the middle and the flooring is concrete with a slope towards the middle where there is a drainage throughout its 60 feet.

HOW TO CONVERT THIS SHED INTO A PIG HOUSING SHED ????? I dont want to erect walls as they have no resale value so a solution with iron fabrication is desirable as it has some resale value.

Please reply on tgf2k9@gmail.com