But central heating is usually not common for gas forced air systems.  

When oil prices soared (gas went from sub-one-dollar to four dollars+) it was all that was needed to cause people to begin to miss payments.

Just leave a note saying you entered to fix or service what was needed..if they won't let you in I guess you call water dept and have water shut off at the curb if it's water related.. call gas and have gas shut off at outside of bldg if it's gas related, notify police your building is unsecured and you have attempted to secure but have been barred access and need escort.. and you file eviction emergency action for cause I always have phone camera ready..the he said , she said on this will be a ongoing situation.. get them both out.. mutual lease termination if possible.. just document noise infractions,, and damages,, police calls are not infraction if they call themselves.. if neighbor call police get copy of report.. if you call its a unsubstantiated report/ shows bias and cant' be used as reason for eviction. better if tenant or neighbor calls.One way or the other they will get out.. damages will happen and better to safe guard yourself then to get between 2 crazy people.. the cops out there will tell you the most violent unpredictable calls are domestics.. and people get hurt, killed,, don't let it be you. 

Supposedly being sold "as is" and gas electric and water aren't even on, so no one should be occupying.  

I notice that the expenses are much higher on quads because the ones I have seen are not sub-metered and the owner is paying the water, electric, gas, garbage, etc 2. 

The driveway from the public road into the battle axe lot should be no longer than 30m and the area has public water and sewage (but no gas).                                                                          

The rent would be over 60% of their take home leaving less than $600 for other basics like utilities, food/household and basic car expenses (gas and insurance only).

Complete remodel with new windows and doors made a big difference, was over 5k before but oil was also a lot more.Another 4-unit gas heated building costs between 1600-1800 a year but this also heats the hot water for all 4 units. again good windows and doors and a well insulated attic. 

One of the things that we have implemented in our Due Diligence in Ohio and Michigan is to call the utility departments (gas, water, power, etc) to find out if they are paid up to date or even on, have a balance,, are on payment plan or are about to be turned off. 

I went to CSUB (Business) and landed a job with a large Oil and Gas company as a Systems Engineer and never left!