A 10 x 24 takes exactly 5 yards of concrete. Add that to your posts, fence, gates, roof, electrical(lighting) and water. My pen is 24 X 10 with four stalls galvanized schedule fourty posts, galvanized perlins, and galvalume roof, water, and lights. When I built it about 10 years ago it cost $2500. With prices the way they are now I would guess between $2,500 and $3,500.