There are some specialized lenders that'll make loans on mobile homes. If the home is in a park, check with the park manager for some suggestions. She/he probably will know of some. However, that's usually possible only on newer homes.
For older ones, look for owner financing. Or look for an investor to do what's called a "Lonnie Deal." The investor buys the property for cash, then sells it to you on terms. Essentially, the investor is also acting as a banker.
Hope that helps.