Have you considered the possibility that when the Irish see the benefits of leaving they will resolve the border problem by also leaving the EU ?
Remainers will of course consider this as impossible.
Is your point misframed?
It would appear you have assumed that there will be tangible benefits of leaving -there is almost no research that shows benefits of leaving.
The more likely scenario is that the Irish economy will suffer as a result of Brexit, in which case maybe Northern Ireland might join the EU