Most "Real Estate Professionals" have told me manufactured homes are not a good investment. And, having had a friend who purchased a Manufactured home, they can be okay, but not the greatest.

Lessons I have learned by proxy: Are you buying the land the mobile is sitting on? If not, How much is the space rent? (friend ended up paying rent on the space for 6 months while she was trying to sell her mobile. She was not living there.) How old is the mobile? Older ones used interior paneling maufactured with formaldahyde, which can give everyone in the house chemical poisoning if you damage it in any way that releases the formaldhyde into the air. Also, they tend to be hard to sell because of that whole difficult to sell thing. Although, if you're renting the space & its not too old to move, you could always buy a piece of property somewhere & drag the house out to it sometime down the line. (just make sure the property is zoned to allow it, and already has hookups. some counties are pissy about anything other than a brand spanking new mobile getting plunked on a piece of naked land.)

Little tidbits, to add to the hunt... Good luck!