Most mortgage lenders will try to lock you into owning the property at least two years before being able to refinance. At least when I bought in 2004 that's the way it was.
Ok, fair enough. I'm sure that's true in a lot of cases but in the grand scheme of things what's 2 years really? And who's to say your going to have that same ability once the market goes up? (i.e. purchasing a house that you'll own 20% of after 2 years.)
Don't forget that towns do property value re-evaluations usually every ten years. Watch out for buying a house that might have a high tax evaluated price and find out that in the next year or so the area could be re-evaluated at lower prices to your detriment. Just another thing to think about before purchasing. Also, get an idea of what the local property taxes have been doing and where they may go. As public funding for assistance to cities and towns decrease and public services get cut to a minimum, real estate taxes might need to be raised to keep the city or town afloat in these tough times.
Just saying you would hate to buy something and come to find that within a year they re-evaluate property values for taxation purposes to find out that your house is now worth $75000 less than what you thought it was worth and then find out that although the property is worth less, you will be paying more in taxes because they are increasing the tax rate by $5-$8 per thousand.
Tough times right now for cities and towns and you need to have a good feel for what the local political and fiscal landscape is at.
I think ultimately, if you want to buy now and get approved for a loan you are going to have to go get pre-approved for an amount and then go shopping for whatever that amount will bring you rather than the at the price you are currently looking at.
You might find better value for the dollar and investment for your dollar closer to the city. In Everett, Malden, Medford, Revere and Somerville might yield you a two family fixer-upper that is more in your ability to get approved for and yet in ten years could see huge growth in value. Just another thought.