Do you happen to be in the military? Where either of your parents? If so you may be able to qualify for a VA loan which are pretty friendly on mobil and manufactured loans. Do you know if the mobile has been moved more than once? If it has been then it will be almost impossible to get a loan on. For more questions that you'll need to know to find out if you can finance it I would recommend calling Debbie Binion, she's with Century 21 Mortgage, 405-613-7359. Another good lender to call would be the Bomar team at 405-445-5445.
Best of luck,