Regarding where to look for work, here are a couple good places to start that would be in your current line:
http://www.mcalvain.com/ (Construction company that does a lot of major roadwork projects)
http://www.achd.ada.id.us/Default.aspx (Ada County Highway District)
With all the residential construction going on in this area, there also should be a lot of opportunities with smaller private engineering firms that are putting in road infrastructure for planned developments.
Regarding where to look for housing, you might also want to check out Middleton and Star. Smaller towns a bit further out, but you can buy more for the money.
In general the schools are pretty good here (especially the Meridian district which includes the schools in Meridian, Eagle, and Star).
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