Some friends of ours are retired Army and although originally from PA, they also decided to settle in Maine. He has found a great job working through Homeland Security---Customs--on the bridge here in Calais. I have another friend who just tested to do the same, and is awaiting her results. The job, of course, would only be available on the border, Houlton included, but right now they are short staffed. There is a new crossing being built here in Calais, in addition to the two we have now, so the need will continue for a while. I know one of the guys currently working Customs in Houlton is awaiting a transfer to Calais. You may have all ready thought of this, and it may not be something either of you are interested in, but I thought I'd toss it out there!
ForestBeekeeper and DavidoftheNorth are great people to talk to taxes about, their heads seem to hold in the numbers much better than mine. I will say though, that for what I receive in services (town), and the quality of my childrens' education, I won't complain. The quality of life in Maine is outstanding, and if I have to pay a little more to live here where my keys can stay in my ignition and I don't have to ever lock my doors---and I can smell pine and ocean any time---well, that $ just doesn't seem to matter all that much anymore. Take care and good luck with your research!