Morning Hans
Having a Parts car close by is a major win (providing it hasn't got the same issue 😁)
The rev counter gets a signal from the DDE which gets signals from the CPS FPS and Cam sensors the sensor only needs to be loose or a degree out, Test it and or change it (but test the replacement first)
As you're so far away I would either get the car transported (my preference), or go ready for anything. That means at least 1 fully charged battery/booster pack. Start with a full scan (INPA/ISTA will show all faults for each system) check all sensors MAF, MAP, TBPS, FPS, CPS. Cam sensors test continuity on the loom for coil packs and injectors. Check/change the fuel pump relay.
From your description you say no fuel or spark, all the above will have an effect there. If all those are OK then you are back to the
Hope this helps
Dave
As an after thought make sure the fuel filter isn't clogged. Plus check out the EWS fault you half saw