Lexington, Lincoln, Weston, Concord, Carlisle, Bedford are all very expensive, mainly single-family house communities. Nice to visit— lots of open space, beautiful country roads—but no need to live in any of those. Burlington, just across Rte 3 from Bedford, is much less rarified and has apartments. Similarly, Wilmington, Billerica and Woburn. Waltham, south of Lex, has apartments too and a bigger, more walkable center than any of those other towns. Closer to/in Boston you pay for the access and walkability which you don’t need for the job, but might be worth it for other reasons.