Must be a very compact route to be getting 3 loops of two stages in between 4pm and 11pm. Looking at maps it does seem the stages are generally very close to the service can see why they're restricting maximum entries.
Without knowing the stages well my one concern as a competitor would be stage conditions after 3 runs, even the smoothest stages these days tend to have small sections that get rutted / rough.
But don't want to sound negative as a co-driver I would love to be doing it and tackling forest stages in the dark is something I'm yet to experience as I'm sure many haven't.