In order to complete a mural, use of scaffolding, a lift and ladders is always a helpful tool. Probably as valuable as a brush! When I do mural work for a school I ask them to supply either the lift or the scaffolding. Most districts have access to one of the two. It saves lots of money over renting a scaffolding for a few days. When my kids were younger they loved to climb around on them, Mom didn't always like that.