Bud, I agree with the others especially @Michael Ealy, I would definitely do this deal with owner financing, 10-15% downpayment, interest only payments and a balloon payment at the end of 15-20 years.
Sometimes investors in other parts of the county are shocked when they find out the cash on cash returns that we get here in the Northeast. The deal you proposed would NOT make sense if you want cash flow.
If you're looking for appreciation in the Taunton market, obviously that's a gamble. I personally still think there's more appreciation potential in Taunton from those seeking elsewhere from Boston, but that's obviously somewhat out of your control.
I got lucky on a property in Mass as it looks awful compared to other parts of the country from a cash flow standpoint but I got lucky as it appreciated like crazy, probably the best investment I've ever made in my life. Obviously this could happen with this deal too but I wouldn't bank on it.
If you do the downpayment with interest only, you can refinance right before the balloon payment is due and hopefully get all the appreication you want towards a traditional loan.