1) How high should it be? What is the prefered (not minimum) height for a backstop?
2) How long should the backstop be from left to right? I was planning on doing a horseshoe shape with about a 50 yard clearning for a good handgun and shortrange for a rifle (it's about 100 yards to the road so I don't want to be shooting at the backstop from the road

3) How much would it cost to set up say a Hogan's Alley type deal in front of the backstop with pop up or even moving characters behind building front sets?
This is not a public gun range for business....just something for me and my friends and neighbors to come shoot at.
Thank you.
Doug