For the non-directional day signal, it would be a pretty easy move.Not that ETM has to start selling Real Estate to raise funds, but in theory could WGR be diplexed with WBEN on Grand Island?
Nighttime would be more complicated - even if you could somehow replicate the existing pattern (using 4 towers) with just the two towers on Grand Island, it has a deep null to the east that protects WDEV in Vermont. You'd end up with a big chunk of the Northtowns in that null, which would not be a good thing.