Check out the Bigger Pockets website. The 3rd party managers are called Property Managers. Make sure you look at reviews to find a good one, there are many out there that will end up costing you more than you save. :)
Yeah, BiggerPockets is a great resource for real estate investing. As with many businesses, it's all about finding the right people and building relationships.
Feel free to message me if you'd like to chat more.