Lyn, "Factory Built" housing has become a very economical, efficient and even fashionable way to satisfy one's housing needs. As a general contractor I have built many site (stick) built homes over the years. However, as a Manufactured Home Dealer, Contractor and developer and as a Real Estate Broker, I have to say that Manufactured Homes have arrived.
You can actually design your own floor plan using any state of the art building materials, components, appliances, etc that you could incorporate into any traditionally built home. You don't have to have a "boxy" looking home at all.
In fact you can design in curvilinear and extended features i.e. bay windows, offsets, split level, multiple stories etc. utilizing wood, Hardy Board (cement board) or stucco siding. You can also choose between composition, shake, tile or cement roofing materials.
You can order any type of appliance, flooring, wall coverings, etc that you wish. Most manufacturers will be happy to work with you in the design stages of your home. One of the best in the business is Silvercrest Homes. They are considered the Cadillac in the Manufactured Home Industry and are very easy to work with.
I would recommend that you contact them http://www.silvercrest.com
or call them at 800 silvercrest or 951 734-8405. Ask to speak to Steve Truslow and tell him that we recommended him. He would be happy to help find a local dealer in your area that would be happy to sit down with you and work out a floor plan that meets your criteria and budget.
Hope this helps and all the best in your "Factory Built" housing experience. Please feel free to contact me anytime should you have any questions. Even though I don't service your area I would be more than happy to help you inn any way I can. I am always happy to help anyone seeking knowledge and information about this fantastic industry..