I am ready to start a build but since I am in Canada and the XPS is almost $80 a sheet where I live, anyone tried EPS and even cheap white foam with success? I am planning to build something similar to the square drop and the nano. PMF would be covering the foam. Walls can be up to 3 inch thick and the camper would be 55in wide.
It might have been discussed but my search has been unsuccessful. Thanks