alfa ideal 5th wheel manual wanted

Bill, you would probably find that the "builders" manual is not worth much. For the most part they are simply generic manuals, that cover the entire line(s) from the builder. There is nothing on the refer, heater, water-heater, A/C, axles, etc. Those are all covered by the manufacturers manuals of the respective item.

You might be able to get PDFs from the various component makers.

Personally I would get the RV Repair and Maintenance Manual by Bob Livingston.