My husband and I have owned a 4 plex for 9 years. We lived upstairs for part of that time. We have raised rent ONLY once but only for 2 of the suites. With the cost of hydro and water going up, I'm afraid we will have to raise rent soon. (But the gov't will regulate that). We have only had 2 nightmare tenants. One wanted to "try" having a dog in our brand new suite that we added on. The $400 damage deposit sure didn't cover everything we had to replace and fix after the dog did a number on that place. I realize there are responsible pet owners out there, but unfortunately it only takes 1 person to ruin it for everyone.
The other tenant was constantly behind in rent, had other ppl living with him in the bachelor suite and was on drugs 90% of the time we tried to reason with him. He smoked in the suite MULTIPLE times and unhooked the smoke detector (big no no!) We contacted the landlord/tenancy board and we couldn't even do anything. If we wanted to "take action" it would've taken 3 months just to take him to court. We even had him sign papers twice saying he had been smoking in the suite. We couldn't kick him out and the police said they couldn't do anything either. So tenants definitely have more rights when it comes to stuff like this. I can understand that it is frustrating for ppl out there who may be going to school or single parents, but like the previous post said, renting is a business. We end up owing the government (CRA) around $4000/year for our rentals, because it is "tax-free"' money. Our profit margin definitely gets smaller every year. And we are "on call" 24 hours a day. This past December one of our tenants had locked themselves out of their suite one evening...it just happened to be my husband's Xmas party. He texted us multiple times while we were out (for supper and drinks). He did not stop texting or calling my husband until we got home around midnight then stopped by our house to get a key. We couldn't drive for obvious reasons, but he didn't want to call a locksmith in the mean time. (He has since gotten an extra key cut - thank goodness!)
Luckily, we've never had a vacancy in one of our suites, but if landlords do, they still have to cover the mortgage. We try our best to "upkeep" the place and some of our tenants do help as well. We give them a bit of a discount if they take the garbage/recycling bins out every week, keep the sidewalks clear in the winter and mow the grass in the summer. We supply the gas for the lawnmower or salt for the sidewalks, etc. But it can be very hard to find good tenants. We always tell our tenants to let us know ASAP if something needs fixing or replacing. They do the basics like changing lightbulbs but if their toilet or sink is clogged or something, we want to know soon before things get worse. All landlords are not out to "get rich".
I agree with Adam...tenants should make themselves "stand out" from other tenants. Treat your first encounter with the landlord almost like a job interview. If you're late showing up to see the suite or your references don't give you a great review, guess what? You're probably not going to get the suite.
Just my two cents.