DEAR BOB: About four years ago, my wife and I bought a three-bedroom house for our son to occupy while he was attending college. Although he was only 18 at the time, it was a great learning experience for him to become a landlord. He always had three or four "tenants" living in the house with him and paying rent. On top of the mortgage, insurance, property taxes and other expenses, he managed to clear $700 to $1,200 per month net income. Meanwhile, the house went up in market value by at least $150,000. more...