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. 

I personally no longer buy properties directly, but invest small amounts ($5-10K) in fractional real estate syndications.

First offense border crossing is considered an infraction under federal law subject to a fine of between $50-$200.

It would be a local bylaw infraction to not have a permit.

Early 20's, single, has never rented before so no rental history, but numerous driving infractions (can't decline for that or I'd be a total hypocrite!).

The attorney gives his opinion, which he is entitled to do, but he doesn't give a single case where the infraction was by someone trying to buy someone's house.Don't confuse someone's opinion, with a court order.