I don't know the labor rate in Boston but I would suspect if you had a build-ready location (site work already done) you would spend about $200/sf if you were the GC and probably just a hair more if you hired one.

Hair cut salon building to 100 story skyscraper.       3.  

I will bet that is a result of the sink trap being full of her hair that goes down the drain and sits in the trap. 

I've even originated some loans this year where we were paying off hard money used for the rehab process and these properties had literally no operating history (barely just furnished prior to appraisal) and we still found appetite for 75% cash out/30 year terms calculating DSCR on a Air DNA figure with a slight hair cut. 

In my market there are a lot of out of state investors buying properties off the MLS for short term rentals and are happy to have an agent combing the MLS everyday on their behalf!

They have to comb through tens of thousands of properties to find a decent amount of leads that will talk to them.

Network with everyone, on my first deal it was my barber that helped fund me simply by a conversation we had while cutting my hair.

If the hairs on your neck stand up- listen to your instinct.

Yes tax assessments are high in the city, and good luck fighting them down with out pulling your hair out, but it never hurts to try. 

Many of those types of deals have already been combed over by 10+ investors previously.