So what if someone has like damn near an acre and most of the ground is so dry that in parts it's got big cracks in it and they have no irrigation; do u just hope for a good rain and then aerate? Or should I let them use a few of my hoses and spriklers to wet the area the night before or something? How long should I leave the the sprinklers on, for 3-4 hours or all night? Or do most guys just plan on doing it after a rain. I don't want to spend $100 on the machine rental and then not be able to use it cause of the hard az soil!