About 15 years a go I helped a bloke make some kennels out of and old freezer wagon it was like plastic covered tin with about 5inch of foam in the middle we made a row of 6 kennels for irish wolf hounds, used 90⁰ tin strips to join it all together n channel to go around the pop holes etc , made a right job was working nr ther in summer and they still all look in good nick ,
Not sure how much they cost but I do remember been paid £4 an hour to help ha