Anyone have experience with mobil home loans?

Im appylying for a mobil home loan. But I keep hearing how difficult it is. It seems my negative is: I do not have an installment loan on my record. I have high FICO scores 750+ across the board. One lender told me putting down 35% might help my chances since I do not have an any installment loans to my credit. Anyone with expereince with this? I mean if I put down 35%... DO you think I could still get turned down?