A great way to avoid potential conflict when this arises would be to set expectations upfront.Include this in a discussion: "in the situation where the heat goes out, hot water heater busts, etc, we will be given 48 hours to rectify said issue; you will be refunded rent for any time past 48 hours that the issue persists"Or something like that...

I bought vent guards that did have an effect at blocking a portion of the smells coming through but the problem persisted.

Since this guy is persistent, the first thing that comes to mind is that you don't want to be reported as being discriminatory (if that applies). 

To Sue's point, why does the current mode persist?

Always remember to persist and you will WIN!!!!

If your dedicated and persistent you will be successful, people always say they cant stand part time Realtors, I have found some full time are not reliable, and some part time work just as hard, it depends on the job you have, and if it allows the flexibility to go out and show properties, you can be successful part time or fulltime, you can do anything you put your mind to!

Persist and you will WIN!!!

At the end of it (let's say if you do this thoughtfully and persistently) I did get action and my house was expedited as the very first connect made as they proceeded with the final parts of this relevant city infrastructure project.

Stay Persistent: Wholesaling can be challenging, especially in a competitive market.

If this persists, I will keep him as a handyman on an as-needed basis and take on overall property management responsibilities myself.