Have 12 years on a Kodiak based Seneca 34SS. I worked out of it for 2-3 weeks at a time and never felt claustrophobic but would never consider full time in anything including a 45 foot Class 8 conversion. But that is just me. We still have empty space both in and out we have never filled so storage has not been an issue. When looking for a rig I figured that one based on a commercial chassis made to be used, abused and driven by employees who did not care would be perfect. Hey, it’s a big old truck about as complicated as an anvil. You give it the care of a car with normal maintenance and tender loving care of a house and it will outlast the owner. Given the budget we had to work with back then I would not have made a different choice all these years later. It holds 80 gallons of diesel and I spend them frivolously without regard to economic cruising speeds. Get in, fill it up and go. I get the motor; she gets the home. And we are both happy. Pick he rig that will fit your needs and enjoy the ride.