Portable 3D Printer
I am a big fan of Raspberry Pi. Don't know if you know, but they also publish different magazines. One is the HackSpaceMagazine. In issue Nr. 36 there is an article about a portable 3D printer. Maybe that is interesting for you. Here is the link:
https://hackspace.raspberrypi.org/issues/36
The article is starting at page 12.
Best regards, Clemens
Mini, i3 MK2.5S, i3 MK4, CClone (Eigenbau)
RE: Portable 3D Printer
A portable printer for all cases could also be this one, for example:
https://inhabitat.com/the-worlds-smallest-cheapest-3d-printer-can-be-yours-for-299/
or this one:
https://phys.org/news/2011-05-world-smallest-3d-printer.html
and some more...
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.