Any reason you're doing the full turbo back? There's zero reason to do it below the bend in the downpipe, and it will quickly fall apart from exposure to the elements.
The areas you want to wrap are all pre turbo exhaust piping, as well as the downpipe to the bend below the turbo. For that, you can make do with 2 50' rolls, you only need straps for the ends of each pipe, and I just use hose clamps since they're usually cheaper than those SS ties. One can of high temp paint will probably do the exhaust mani, up pipe, and downpipe.