I could have gone with a manual, since it's only one cup a day, but I know myself and would quickly be annoyed with the grinding process. Also, there is maybe twice a year I need to brew coffee when people come over. Does the grinder take space? Yes. It's like the size of a small blender. I put it in the dead corner of the counter top.
Let us know what you end up with. I may get a manual for travel fun.
Years ago there were some multi-account credit cards floating around. Maybe that could be open sourced... Not sure...