I have talked with many investors who may have sold all their properties and moved their money into other asset classes such as stocks or bonds given that they think rental properties are much too big of your headache. The scenario is usually the identical. They made current debts invest their, they heard rental properties were a high income makers, they get a few properties, and attempt to manage them automatically.
Pretty soon these are burned out from dealing with tenants. After a number of bad experiences and plenty of messages or calls from renters, they choose that rental is way too big of a headache and they sell out. I have heard this at least a handful of times and every time I hear this I always ask "Why didn't you let home management company handle your properties?".
Most of times I get a reply of "well you pay much too much". In truth, most property management companies charge between 8-10% of gross rent collected for residential properties and 3-5% for commercial. This can be a fee to pay for what you get.
There is often a difference between a home manager and a property management company. When you hire a house manager you happen to be hiring a staff member. You will have to pay them a salary and pay payroll taxes to them. When you hire a house management company you might be simply outsourcing the management to some company. They are not an "employee" of yours.
In many cases I lean towards getting a company as opposed to dealing with a staff. If you only own a few properties you will definitely only engage a company as you won't have enough income to support a staff's salary. At some point, driving under the influence sufficient, it could be in your best interest to work with a person whether full-time or part-time.
Here's the main advantages of hiring home management company when you start purchasing rentals.

A professional property management company knows what the law states for landlords and will make certain you happen to be doing everything legal
A professional property management company will know the best way to most effectively market your properties to realize the lowest vacancy rate
They will also know how to get the most rent of the property because they understand the market
They will have a network of contractors for top level rates for repairs and maintenance in your properties
You can learn from other useful knowledge and experience from working with rentals
You may decide to manage the properties yourself. go now do. If that's everything you like and you've got enough time, there's certainly nothing wrong with that. But don't forget you can study a lot from using a professional company.
You will want to get references before picking which company to go with. Also, be sure they have their real estate property license. You also require a company who concentrates on your kind of property. For example, you may not pick exactly the same company to get a commercial property while you would just one family house.
The bottom line is if you need to be an angel investor or do you need to be a landlord. Personally, I don't want to be described as a landlord so I use property managers.
Happy investing!