usually the "factory" manual is a joke.
I would get a manual on your chassis, this will help with the info for your engine, drive-chain, etc.
I would also get the "RV Repair and Maintenance Manual" by Robert Livingston. This will cover your water-heater, furnace, stove, refer, etc
2008 F350SD V10 with an 2012 Arctic Fox 29-5E When someone tells you to buy the same rig they own, listen, they might be right. When they tell you to buy a different rig then they own, really pay attention, they probably know something you don't.
N7Bsn is right. We have an AC As well. The appliances and chassis are common stuff, the plumbing and electric also common. Learn all you can about the common stuff, don.t worry about who made the cabinets and fiberglass. Send me a PM if you have otber questions about winterizing, etc.