Also you might try Toby Cooksey with Country Place Mortgage in Addison. Phone #972-764-9309 and his email is email@example.com.
A manufactured lot will NOT finance something that they aren't selling.
Your Realtor should have some connections as well. If you are not using one, you should be. A good Realtor can save you money and headaches.
Accredited Buyers Representative
NMLS # 354776