Please recommend eviction lawyer in Massachusetts

[Linda Roberts]

Hi, I bought a multifamily a year ago. In one apartment I have long time tenants at will with rent about $600 below the market price, or $800 below, if I renovate. Four months ago I sent them a letter terminating old lease and offering a new rent that was $400 higher. I gave them almost 3 months notice, and new payment was supposed to start on March 1st. In the beginning of March I received from them a regular old payment. What should I do now, considering current situation? Can anyone recommend experienced lawyer in Boston (Medford) area?  

What if I offer cash for keys? What would be a reasonable amount? If i sign with them cash for keys agreement, giving them 2 months to move, do I still need to send a notice to quit?  Appreciate any good advice. 

[Avery Heilbron]

@Linda Roberts Andrew Delory from Delory law based out of Everett can help.