I believe there is a limit at the moment about how many times a train can cross the crossing every year, I think it's something like 12 but it could be different
If it can be turned in to a "proper" crossing, on a "proper" railway, there might be all sorts of opportunities: not only through working by the NNR to Cromer Beach; but also how about Greater Anglia trains terminating at the NNR station in Sheringham?
There would be much better shelter for passengers (even if the station buildings were only unlocked when the heritage railway was in operation); particularly if the downside platform canopy is restored, and the NNR station would give passengers arriving from Norwich a much better first impression of the town.
The B.R.-built "halt" platform on the other side of the crossing could be closed and demolished, and the money no longer required to be spent on looking after it could be paid to the North Norfolk Railway instead - plus a track access fee.
It would appear to be win-win all round.