This is for motor homes but most of it applies to trailers as well
Engine manuals: Contact a dealer who sells that make. Or the comany that made the engine.
Same for transmission..
Chassis.. YOu really don't need a manual as the only item of value is lubricartion oints
House (This part applies to traiolers as well)
Walls are walls. Both inside and outside, you should already know all you need to know there. Same as (inside) your sticks and bricks (Outside) your car body.
Doors, Mirrors, Steps, Believe it or not those are all 3rd party products and most of the companies that make 'em offer on-line downloadable manuslas Google something like this make, model, manual
Replace make and model with the make and model
Appliances, Fridge, Microwave, TV, A/C Water pump. and so on and so forth
Likewise, you can download the manuals online
Even leveling jacks
that is my suggestion... Download the manuals from the manufacturer's web site on all but the chassis. Engine and transmission manuals you may have to purchase.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times