It is boring and you will have little control.  

Keep in mind you have no contractual with owner so you have limited ways to get compensated.

From my limited experience there are two types of agents. 

Investing in commercial is definitely the way to go, because you have more control of the asset value in the long run.

Hi All, I am running up against the personal mortgage limit of (10) and have to go commercial if i want to continue . 

Your options will be limited, You can file documents that will allow you to go after bank accounts and garnishments but that gets more complicated and he may need legal advice to do that.

Neighborhoods without that much building have a much more limited supply (although they change less too.)  

I've also read on forums that the customer service is super limited with this method, by email only, so no personal touch at all, which obviously, is the cornerstone of a real estate agent's value, along with their knowledge and expertise of their local market.The day we can take emotions out of selling or buying real estate is the day realtors will cease to exist.

Regardless, this left me with limited options. 

So the seller retains control over the original mortgage, unlike a subject to.