Thanks for the information oldfart. It is very helpful to hear from someone who has actually installed drywall in their mobile home. Unfortunately, you seem to be confirming what everyone is saying about cracking problems.
However, your experience with installing the drywall vertically gives me some hope. I'm definitely going to install it vertically now and hope for the best. As far as your computer room is concerned, take a look at what I wrote about my vertically installed paneling. It took almost 4 years for it to start cracking, and I didn't even tape it, or use drywall mud. I simply removed the batten, smeared joint compound on the cracks, and sanded.
Maybe our combined experiences hold a secret to installing drywall in a mobile home - it will last longer if installed vertically. Of course we won't know if this is true for a few years.
Thanks again oldfart.
Yanita & Henry - As far as the foundation is concerned I'm pretty sure that my mobile home repairman told me years ago that I did not have tie downs, but he did not seem very concerned about it. He also said that he had seen many other mobile homes just like it in the area. My home is in Connecticut, where wind gusts rarely exceed 60mph, and serious hurricanes are pretty much non-existent.
My home sits about 3 feet off the ground, but I'm not exactly sure how it is anchored, if at all. The only time I really have to crawl underneath is when a pipe breaks and I need to shut off the main water supply until it can be fixed. All I know is that it SEEMS very secure, and I never feel any movement, even when we do get 60mph wind gusts.
The home is 14' x 66', with an attached, enclosed porch that is also 3 feet off the ground. It has 3 bedrooms and 2 full baths, so maybe the size, weight, and attached porch help to anchor it somewhat, but beyond that I have no idea.
Thanks - Joe