It would be nice if the Stadium Steering Committee would approach some local contractors or developers to get a idea of construction costs. Strescon for steel and Cherubini for steel.
This would get the ball rolling in a serious direction. 50-71 million seems high for the stadium being proposed of 10-14 thousand permanent seats.
Maybe Cherubini could do one section in steel and Strescon do the main stand in concrete.
Cherubini Metal Works
http://www.cherubinigroup.com/
Strescon Concrete....Concrete and Steel
http://www.oscoconstructiongroup.com/concrete.aspx