You can set up a Green house for very little money anywhere. The cost of a roll of good thick guage plastic and the framing materials. Some people in rural settings have made green houses out of split trees and plastic. So, you can do it from realitively cheep to as much money as you want to put into it.
References :
http://www.igcusa.com/
http://www.aces.edu/pubs/docs/A/ANR-1105/
http://www.wvu.edu/~agexten/hortcult/greenhou/grencons.htm