Homeowners insurance and title insurance may not be the only kinds of insurance you need when you buy a home. Many buyers also have to purchase mortgage insurance, which lenders require for mortgages with a down payment of less than 20 percent. Take the time to understand what you're buying and how long it will affect you. Mortgage Insurance Protects the Lender Most types of insurance will pay you if you make a claim. Mortgage insurance, though, is solely for the lender. If you were to stop making payments and the lender foreclosed on your home, the mortgage insurance would…