Mobile homes can be built with additional insulation in the walls, insulated windows and doors and other heat and energy saving features. Ask the manufacturer about insulation and also talk to home builders about the R factor or type of insulation they recommend. It is well worth the money to add addtional insulation to the home.
Mobile homes are defined as a residentail living space that is built on a chasis and wheels and can be easily moved or lived in while still on the mobile chasis and wheels. Mobile homes may be single or double wide resulting in more or less living space and floor plan options.