The serving of the notice does not dispense with recording the claim of lien.

Stick to basic features like smooth-top ranges, dishwashers with basic cycles, and fridges with water dispensers if the budget allows.

After she/he moves out, follow your state guideline for deposit dispensation, the deadline of which is likly triggered by the latter of the tenant moving out or the lease ending date.  

MA will likely be  pretty limited in where you can  grow/dispense given every town seems to be adding zoning restrictions now. 

From fully automated Kiosks (an ATM looking thing that rents the unit, sets up auto billing on tenants bank or credit card, dispenses a lock if the new tenant wants to buy one etc), to smart phone Apps that do the same thing (except vend a lock) to 24 hour USA based call centers that will manage the business and rent the units for those customers who want a human to talk to (and the Kiosk software, smarphone App software, and call center sofware can all be seemlessly integrated within your business management software.

When I was working in Maine and NH, I recall petrol stations dispensing both kerosene and furnace oil (really diesel) and folks buying 5usg  containers to heat their homes for the day.

Past experience suggests that even experienced investors sometimes dispense wrong information about the legal requirements for their own areas. 

I have two refrigerators that make ice but do not dispense water.

The GE Cafe package has more functionality (Ice dispenser, filtered water, Keurig, wifi), while the Viking has a stronger luxury brand. 

If those steel tanks are set up like O2 or SCUBA tanks, there will be a valve on top that you open to dispense the gas inside.If it were me, I'd open those valves to be sure the tanks were empty.