Another real estate writer's mini course, full of promises and fluff, ended with a "lesson" on why you need to buy his book so you can finance multiple properties "subject to." The reason, he said, "because banks won't let you finance more than ten mortgages."This simply isn't true.First, banks let you finance as many mortgages as you can pay for. Some banks limit the number of loans made to one person. Experienced real estate investors just move on to another lending institution.I know one inve.