Selkirk Merida is a Marathon, not an Enduro. Enduros have timed special sections. Actually Merida is more of a Point to Point, but thats v old terminology. But it definitely is not an Enduro.
But yes I think the logistical challenge of this might well outway the reward in organisational terms to try and do it in a oner, and potential pool of entrants would never be enough to fund your costs. Might be better to run it like a Trans Rockies type event, where the whole crew moves as each stage is run, and make it more do-able for ordinary human beings. A week long event spreads out and justifies the high costs a bit more.
For bike returns from FW coaches would be the way to go, that’s what they do with 7000 bikes in L’Etape du Tour every year. Book a place when you book your entry fee.