Movement within the real estate market relies critically on changes in family sizes and their circumstances, as the most recent challenges in the market have pointed out.While a “starter home” is generally about 1,200 square feet of condo or single-family home, with a balcony or yard or basement, and is often the first home a married couple will own, the homes from which seniors downsize will generally be the home in which that couple raised their family.I had clients who were looking for a million-dollar home on the North …