There are many ways to assemble a Haul Kit. This is not a recommendation, these are showing you some of the various options to build a 3:1, 4:1 and a 6:1. These kits are NOT designed for industrial or professional rescue work. Click here to see all of the options for building a haul kit. Remember, buying equipment does not equal knowing how to use it. Alpine Savvy is a great resource for learning about mechanical advantage and setups.
What goes into a good haul system you ask? The rope, the more static the rope is the better. Edelrid's Rap Line and Petzl's Rad Line are great, ultra light weight options. Static > semi-static > dynamic. A simple system, people often confuse redirects with increased MA. That 27:1 may look cool but in the real world it probably isn't any more efficient than a 6:1. And who carries that much rope? If you you only have one pulley, place it as far away from the load as possible. Lastly, knowing how to use what you have on hand.