A 28' Airstream starts at $190 and weighs 8,800 # I estimate a 28' Oliver would weigh a little over 8,000# using the pound per foot of an E II.
A 30' Airstream starts at $204 and weighs 10,000. I estimate a 30' Oliver would weigh a little over 8,800#.
I want Oliver to thrive. You innovate or die. Casita is going to eat Oliver's lunch.