I think East Boston is a good investment.
I also think Dorchester, Hyde Park, Roslindale are good investments in Boston.
Boston of course, has great taxes with the residential exemption. I would be concerned in Eastie about the airport, the casino, and about my commute, whereabouts do you guys work?
290 is a pretty affordable single family in Boston, believe it or not.
Its an old house, are you handy? Contractors definitely charge a "Boston premium"
Are you opposed to being a landlord and buying a multi family / renting out half? Given your income you could swing it.
Check out Metro Credit union - they did my boston mortgage, have great rates and good customer service.
I also have a good inspector if you need a recommendation.