Its a 4 day expedition race. As a race director for 24hr adventure races (and I'm talking about proper adventure races not some crappy imitation where you have to make jigsaws and then offroad bike across a fckng playing field here) the compliance costs and logistics add up quite a lot. They will supply paddle gear etc so no costs there.
We do one, sometimes 2 expedition races a year – average entry cost is about $2000NZ per person, plus travel, plus accom, plus plus plus. Yes its expensive but for a 'supported' race its not too bad and quite simply our team are prepared to pay (if our sponsors can't or won't)
This is a 4 day race, I'd be expecting you to sleep less than 90minutes in any 24hr period to be competitive and do the full 400k course, of course you might want more sleep and travel slower so miss the optional CP's. Sounds like a great course and Open Adventure have a track record of good races, it would be a hoot.
Of course you can do it for free should you wish to, we do lots of 'events' where we put together a course, mark out some cp's and then let people know where and when to be and go at it. Of course its just 'training' so yeah you could do the same thing for nothing assuming you have the gear and the wherewithall to want to. But thats not the point is it ?
😆