The Winnebago Era 70b is built on a Mercedes 24’ diesel Sprinter chassis.  The RV was built in 2019 and was hardly used when we purchased it in 2022.  It remains in great condition: 26,000 miles, new tires, new lithium house batteries and Victron controller.  With the solar panels and the lithium batteries, there is no need for electrical connections.  We are the second owners. We purchased two years ago, instead of renting, for an amazing three-month trip, and we have since enjoyed the RV for many weekend trips in Arizona.  We have since purchase a vacation home, so we won't need to be taking advantage of the RV.  On our three-month, 10,000 mile journey to the Canadian rockies and the US West Coast we averaged 17 mpg thanks to the excellent diesel engine, which had no trouble keeping with traffic while climbing 7% mountain grades.  We would consider adding our Thule bike rack, suitable for two e-bikes, and a swing-arm that allows rear access to the back doors.