Renting a gas powered vehicle could be an option for the two times a year needed.

I bought a PHEV back in June (Ford Escape), have driven 1500 miles since and have yet to add any gas. For most daily trips the battery gets me there and back without using any gas. I love it and am excited for full EV for my next vehicle.

I think you could download the ISO for tumbleweed on your host system, mount it within your VM, and add it as a local repository through YaST?