The city of Boston has some strict zoning rules covered by 14 different neighborhood codes, all with different rules.  

This is a fairly low price for somewhere north of Boston.

I see your from Norwood...I'm on the North Shore, basically still greater Boston...my experience is that cash flow inside 128 will be very difficult...even inside the 495 belt will be tough but doable maybe in the cities of Lowell and Lawrence or down closer to you say Brockton or Taunton ...to get good cash flow you have to go to central Mass or even RI...

By the end of 2017 I plan on purchasing a multifamily property with positive cash flow located near Boston, MA (ultimately, inside the 495 belt).

Prices seem to be insane in the northeast (NYC/Boston/Philly/DC).

Thanks in advance for any advice you can provide.For a little background on the house:A little over a year ago my parents decided to sell their house in Hanover, New Hampshire and buy a house in the southern part of the state to be closer to Boston.

About the only thin not deductible is the cost of your own personal labor, but all tools, transportation, interest and depreciation are all deductible expenses.If the mortgage interest was totally eliminated for personal residences if would have a negative effect, but consider it would not affect flippers, landlords, investors, people without mortgages (about 1/3 of home owners) and have little effect on people with small mortgages, and no effect on anybody that takes the standard deduction and doesn't itemize (another 1/3); the impact could be less than anticipated but still negative.In Bigger Pockets Podcast #82,  I talked about how capital gains taxes should be indexed for inflation. 

I’m especially interested in govt sources of public filings, records, notices, & other data. Thanks!

That would cost you approx $40-50k but helps solve your parking issue by promoting public transportation to and from your site, it increases the City's public infrastructure footprint, and adds value to your commercial property.

The MD State Department of Assessments and Taxation (MD SDAT) estimates the value of a property, and the county or city is responsible for billing and collecting the taxes.Property taxes are generally used for things like public safety, sanitation, education, transportation, health services, legislative expenses, social services, recreation, and many other services extended to residents.AssessmentsThe total assessed value of a property is split into two sections: the land value and the property value.