Work a pad/tablet in your office budget and download (and dropbox) as many manuals as you can ....it will change your life. Not only that but I always have access to this site when on service calls. Large screen smartphone can work as well.
Wisdom! Let us attend!
The Kindle Fire (just the regular one) is a fantastic product for this-- small, yet plenty large enough to read technical documents, and inexpensive, well under $200. And getting documents on it is as easy as dragging a file to the Kindle uploader app in your task bar, sends it right to your Kindle. It's my workhorse pad. Plus, since I'm Amazon Prime, I get to watch loads of free movies and TV shows on it. Toot-sweet!