I didn't go but listen to some guys locally who did on 40 meters this morning.  Their descriptions, brochures they picked up, and general conversations about what they saw was quite interesting.  52 square yard for a concrete base for the 150 foot tower, I believe, and 75 square yards for the 170 footer.  It was something like that any way.  Alan out in Phx is a good source for the Luso tower information.  The tallest tower was at 93,000 dollars.  I personally have studied the U S Towers and I'd prefer going with their 89 foot motorized crank up or the 106 foot motorized crank up.  Better price and great specs.  About 43 to 50 thousand dollars and a lot less concrete, if my memory serves me.

Phil.
K0NX