As was posted earlier you can obtain a copy of the owners manual.
I would also suggest that you get the make and model numbers of all the appliances, water heater, refrigerator, heater, MW, awning and anything else. And do a search on line and you should be able to obtain manuals, parts info etc. for those items Save them to your hard drive for future reference.
Also copy down serial numbers.
2004 Jay Feather 25E
2001 Ford Expedition 4X4 EB 5.4 3.55 rear
2004 Ford Expedition 4X4 EB 5.4 3.73 rear