Wells Fargo has won awards for being the leader in manufactured home loans. I'd give them a call and whomever currently holds the mortgage on the manufactured home if pre-existing.
You can usually expect to pay higher interest rates when financing a manufactured (what we used to call mobile) home.
Another key to successful financing is ensuring Buyer has obtained a Certificate of Compliance from a professional engineer and that the engineer has delivered said certificate to Buyer's homeowners insurance agent. (It's a "newer" HUD rule and can't be bypassed.)
Hope this helps!
Newton, WI 53063