Move it or Not?

[CaptT820]

We bought our camp 3 years ago and thought we knew where our property lines were. The neighbor had their septic redone and thus had it surveyed. they found out that the property lines were not where everyone thought they were and they shifted diagonally. Our camp (which is only 12-ft by 20-ft) is now 10-feet onto the opposite neighbors property (east side). Luckily for us, the east side neighbor is just vacant land, for now.

So the issue up for debate is do we move the structure so it is compliant (it would need to be moved 20-feet west) or do we get a lot line adjustment with the neighbor? I'm weary about going the adjustment direction because if they ever decide to build then our structure would only be 10-feet away from their structure (potentially). This is of course assuming the neighbor was okay with even granting the lot line adjustment in the first place.
Obviously going the other direction would require us to move the building, which can be done, but is not ideal either.

Any thoughts or opinions on this would be great. Thanks