we are in the process of building a home in iowa - going to break ground next week! it is a modern style and we would like to be as green, creative, and economical as possible. unfortunately, our design has called for a fairly lengthy driveway (approx 2500 sq ft). we are very interested in exploring a grass block product - has anyone used one? is there a brand that is more economical than others? how does it work with snow removal? any other suggestions for a driveway? thanks in advance for your input!