What does it cost to live in MetroWest Mass?
If the attached article is correct, not as much as you might think. According to this article from the Northborough Patch, a family of four (two adults, a preschool age child, and another school-aged child) would need to earn $74,000 to make ends meet without public, or private assistance.
Personally, I'm pretty sure that the authors of this article do not know my daughters, or these numbers would be skewed higher, and I live in Northborough, MA, which, according to the article, requires an income of only $64,728 to meet its needs.
It shouldn't be a surprise that it's less expensive to live in Worcester County than in Middlesex County. Properties close to Boston tend to fetch higher values than those farther away. There's also a psychological barrier for many prospective homeowners who work in Boston. The feeling of many is that any home located West of Interstate 495 would be too far away for the daily commute into the City.
Northborough is just outside that 495 line. It's still commutable in my opinion, but it's why properties in Southborough, MA tend to be valued higher than Northborough. Even though the towns share the same high school, Southborough is right at the 495 cut-off, and in high demand as a result.