Property management companies are all across the GTHA. A quick Google search will pull up more than a dozen servicing landlords across Ontario. The key is finding the right one to fit your business objectives and portfolio (or property) size.
While management fees vary from 3% to upwards of 8-9% the best indicator is finding one that fits your objectives, even if that means paying a bit more for their services. A good management company will relieve the landlord of midnight emergency calls and texts, tenant complaints, non payment issues etc which make them a valuable player as you work to grow your real estate portfolio.