PS I have read the same thing that bugs elaborated on. The deal with alot of the modular homes that are factory built is that everything is built in then factory then shipped and built. So walls are all built with insulation, conduit, even plumbed. Since they are on an assembly line they are all built to a standard process that has a higher level of QA then a home built on site by construction workers. I am not saying that the construction workers to a bad job. I am saying though that assembly line construction in general has lower tolerances for error. All the walls come out the exact same size, etc… So if the slab is even then the modular house will be built in a fraction of time, generally two weeks, and yes it very often fits together better so to speak.
Also I saw the special on the architect who was designing homes out of shipping containers. Very interesting stuff.
Last but not least, lending criterion has been much more strict on manufactured homes so I believe that you will not see many foreclosures at all on manufactured housing.
My only qualm about manufactured housing as an investment is that I think it is a better investment in a ROBUST housing market so you can tap into the buyers who cannot afford the market. Now that the market is declining I feel that the entire market psychology will even extend to even touch this market as well.