Washing with a normal garden hose is absolutely fine , every bike has bearings which are protected but obviously don’t point a powerful jet washer directly at them or the crankshaft bearings from 2in and you’re good
EBay’s full of ebikes ;
https://www.ebay.co.uk/itm/256815519764?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=oLO4XbzISdq&sssrc=4429486&ssuid=2l1LzfbQTke&var=&widget_ver=artemis&media=COPY
It is odd that they’ve stopped making the kenevo, pretty much all the other manufactures are building the equivalent bikes.
I’ve also got the 2020 version full 29nd it and upgraded all the parts over the years and am always thinking what my next bike will be. There is nothing out there that...
If go with the newer 2025. You said it comes with better bits, I’d be constantly worrying about the carbon frame plus in 3years time when you sell it it’ll be a 5year old model .
That shop sound like a bunch of cowboys (no offence to real cowboys, it’s a Uk expression for conman) ☺️
That issue is common and probably just needs a battery to motor cable not a complete bike !