

As someone tangentially involved in similar projects, it is almost impossible to sell something legal to run on roads for less than that. There is a missing legal category for self-built low cost low power vehicles.
I can make a 500 euros electric scooter from a second hand bike. It will be safe, but it won’t be legal.

In French this seasonal movement is called “transhumance”. And funnily enough, I have seen people here confused by the whole “transhuman” theme by thinking it was related to sheepherding.