I worked in manufacturing plants in my adult life.

The fridge wasn't that old and the insurance company wanted the icemaker to see if they could go after the manufacturer as well as a statement from the repairman so we had it replaced.

(Bear in mind, most houses we typically deal with are going to be built after the 1910's and 1920's... and renovated sometime after the war during the housing boom)After the public got used to the idea of taking a **** indoors, and various advancements in microbiology happened (To say nothing of advancements in manufacturing), people started realizing that they could have colors other than white in their bathrooms.

There is a national tax attorney in Ohio that has clients all over the nation that are doing manufactured housing communities and real estate transactions.

Most manufacturers will recommend that you braze the refrigerant lines not solder, due to the higher pressures of 410a.

Check with the government entity in your area in charge of titling manufactured homes.

For clarity on the use of the concept of "wholesale", you can look it up in your state's statute or you can look at what NC says (similar to some other states) about its use:Unfair and deceptive trade names; use of term "wholesale" in advertising, etcThe only real application in NC for wholesaler is a mobile home wholesale dealer who buys direct from a manufacturer and sells to MHP or developers, not the public.

I find it hard to believe that its a problem they would have been working on for almost 50 years but unable to resolve.Baltimore is a lot like Detroit -- Baltimore used to be a manufacturing powerhouse with Bethlehem Steel being one of the largest employers.   

I work part time at a small, family owned, manufacturing company.

You may want to check with a few mobile home dealerships and/or the local manufactured home association.