RE: Finding\Starting a new field
It all depends on the landowner. I lease only the land I use, meaning the parking area, pit, and runway. If you'll look at the pics through the link I posted, you'll see how much area that is. The fly-over area is no charge. My lease is $900 per year. That number was derived from the dollars in hay she was going to lose, since it is a hay field I am leasing. So, the area I lease yields $900 worth of hay.
Again, it all depends on the landowner.