It will be like a car title if not attached to permanent foundation.
Get a bill of sale completed and notarized. Make sure it has a clause like "free and clear from any liens or encumberances".......if it doesn't I suggest you get a lawyer to complete the Bill of Sale for you.
Unlike real property, mobile homes can have multiple titles that may not have been filed with the state.
You might seek a car title search company in your city. They will be able to obtain the most recent title filed with the state.