We went with GoodSam/Bank of the West for our current 5er. Being Full Time and Retired we didn't have much to put down as income. Even tho with fully paid trade and cash down we would only finance 1/3 of the price many of the normal places wouldn't even talk to us.
GoodSam worked, but it took a few months and lots of paper work.
2018 Chevy 3500HD High Country Crew Cab DRW, D/A, 2016 Redwood 39MB, Dual AC, Fireplace, Sleep #Bed, Auto Sat Dish, Stack Washer/Dryer, Auto Level Sys, Disk Brakes, Onan Gen, 17.5" "H" tires, MORryde Pin & IS, Comfort Ride, Dual Awnings, Full Body Paint