looking great. :ylsmoke:
Keep us posted once you are finished and start using this camper.
I fear you will have little to no cellular reception inside.....
For my build I looked into the foil faced foam, but two things turned me away.
*The foil faced polyisocyanurate foam crushes and crumbles when impacted
and
*lack or (or very near) ability to use wireless devices within a camper insulated with it
My final decision was to go with blue extruded polystyrene foam. Slightly less r-value, but much more robust, and lacks the foil face.