The lowest interest rates are generally found with a conventional mortgage. This mortgage is going to the bank to finance the mobile home, the land, and the land improvements. The downside to a conventional mortgage is you usually need a larger down payment to get this type of loan. Plan on a down payment of at least 20% for a conventional mortgage. Since the down payment includes the land and land improvements, a typical down payment can run you tens of thousands of dollars, depending on the land and the home you choose. A conventional loan is usually better for people who are buying their second or third home, where they can apply the equity in their old home toward the purchase of a new home.