As someone who tried those kickstarter specials... They just aren't there unless you use a laser-based system, which are many thousands of dollars. You'll get a point cloud that is close-ish for whatever part you're scanning, but unless it's strictly decorative, you're going to find pretty quickly that it's faster to just re-create the thing from scratch if you need any kind of dimensional accuracy. The scans are somewhat useful as on-machine references, but that's it.

Also, scanning is a lot more work than you'd naively think. Reflections are the enemy, the matte spray used for scan prep is messy and expensive. It was fun to play around with, and I learned a lot, but my current advice is don't bother, you'll just be disappointed.