Thanks guys for the comments. Paul - yes, this is a saguaro cactus. It is illegal under Arizona State law to move or transport any saguaro cactus from public or private land without a permit. I was getting a quote the other day to put one in my yard. You even should keep the N/S orientation the same after you replant it.
I like the scene a lot, nice composition on the large cactus. I think you mentioned previously that's the cacti are protected by a state law of some sort. Paul.