When looking for a mortgage to meet your needs, consider these key questions: Is your income expected to increase in the coming years? How long do you plan to live in your new home? And, which mortgage will provide the lowest interest rate?While 15 or 30 year fixed-rate mortgages are the most popular, and Adjustable Rate Mortgage (ARM) offers some interesting alternatives for home shoppers who plan to move again within four or five years. Although interest rates are the lowest they’ve been i.