Getting a mortgage for a resort-area condo might become more difficult after Fannie Mae and Freddie Mac moved to tighten rules on buildings with many short-term rentals and hotel-like amenities, some Realtors and bankers say.  Fannie Mae last month changed its rules to make it clearer that it won’t back certain loans in high-rent vacation areas, with Freddie Mac taking similar steps that go into effect next month.    Read the article…………………………….