Just for comparison I too am shopping for insurance for a new Class A Diesel Pusher Entegra MH. I've called my current two companies.
State Farm wants $5,500.00 a year
Progressive wants $3,700.00 a year
Both with $1,000.00 deductables and $0 deductable on glass replacement.
Progressive also has their deminishing deductable plan so for every year you go without making a claim they reduce your deductable until it reaches $0 on a claim. Progressive has been very good to me as I had 3 claims in 2017. One for my truck that cost $4,500.00 to fix and a new windshield after a trip to Alaska in 2016 and a blown out driver door window when a rock came off a cliff in Oregon and blew glass cubes all over the interior of the crew cab. VERY LOUD. Freaked our German Shephard out. Dog was shaking like a leaf and he was in the back seat.