In Boston:
I suggest you call Greg who runs two houses out on the blue line 4 stops from the airport in Reevre Beach. The places are on Campbell St, two blocks from the train station. Costs a buck to/from Logan.
Logans Crash Pad
$135-175/mo
no car needed
20 min to Logan
fully furnished house
(617) 359-6234
You should also go and post your question to the "Crashpads" folder. It's the last one under the "Aviation Interviews Board" header.