The other day I ran across this project on kick starter. In theory I looks like it could be great for blueprints of design. You can back it but the cost is a little high for something that might suck.
https://www.kickstarter.com/projects/occipital/structure-sensor-capture-the-world-in-3d
https://www.kickstarter.com/projects/occipital/structure-sensor-capture-the-world-in-3d
