I found the document for the Raspberry Pi. I checked Sparkfun and Adafruit and it is on backorder at both places. I also found an Iduino but I am not brave enough to try one.
I have a Raspberry Pi but the instructions for getting it setup are missing a few things like how to generate a bootable image on a Windows system. I did it a long time ago and I will go back find my notes and build one.
If I remember correctly there were a whole lot of other little things to remember to do to get it working. As I go through the process, I will make notes and send them to the author of the getting started for the RPi. Ada fruit also has some possibly helpful content so I will add that to my notes.
I just looked at Vuforia and it appears that a few is involved for using the software. Is there a free developer version and if so can I get a copy.