Some mystery surrounds the financing of mobile homes vs. manufactured homes vs. modular homes. While completing a mortgage loan for a family, I stumbled upon the following guidelines. These clearly are the best I have seen in defining the difference.

Reputation and the Non-Prime Mortgage Market (Federal Reserve Bank of St. Louis)
*I appreciate comments provided by my colleagues at the Federal Reserve Bank of St. Louis. William R. Emmons, senior economist in the Banking Supervision and Regulation division, and Rajdeep Sengupta, economist in the Research division, provided special assistance.