Again, the way to dismantle a structure is to take the pieces down from the top until you get to the foundation. If you pull the foundation, you have a violent destruction. Borders are the foundation of a country. The delineation of one place or another. You start with superfluous social concepts like socialized welfare, wage controls, and market regulation. Once everything is a voluntary socially, then by definition public land disappears and borders don't get abolished but privatized.

As far as: how wouldn't we be trapped on our own property? Natural cooperation. It is not economically feasible to own easement land (15 foot wide land strips between allotments) So, people will naturally sell these portions to the most economic actor available, a road maintainer. They would charge all interested parties for repair or liability in the case of intentional damage. Tolls are one option for high cost, large, multi-lane, highways but that's a cost users of a road would have to bear. (By the way, who will build the roads? Is a crazy rebuttal in 2025)

The appropriate order of the destruction of the state is hotly debated but no one with a coherent rationale has ever explained why if the collapse of the state isn't instant, that borders should be removed first. In the method of stopping a fight, you put down your weapons and negotiate before removing your armor.