How do you adjust it?
A speed wrench that can adjust within 20 seconds 2’ or just 1/1000”. Another option is a portable hand drill.
How much can it be adjusted?
2 feet and 2 inches. Up or down. It can be stopped at any height you wish.
What can it be mounted to?
Your largest place to play basketball is your driveway into your garage, so it can be mounted to a slanted /flat roof or outer wall of garage or post.