You are averse to a bad tenant situation such an eviction.

My friend who is in same situation get response back after emailing him.

At the same time, I believe it’s important that we approach this situation calmly and constructively, as we both share the goal of resolving it efficiently and fairly.I did find your email to be pushing and impatient, which I didn’t appreciate.

I've been wanting to get some advice from people about my specific situation, but there's a lot so I'll try to keep it to the point;In short, I'm wanting to "officially" start my real estate investing journey, making it my source of income - and I'm wanting to do house flipping as my strategy, at least initially.  

There will be lots of learning as you go so be prepared to bumps in the road and learn from every experience/situation 

Agree, Ring or some other camera monitoring  system, security systems will  have issues with alarms &  beeping and other issues which might be a nuisance for guests. 

That's not to say all properties will as it's very dependent on the property and the investors situation.

A $200,000 duplex might have identical rents in municipality “A” and municipality “B” but the property tax rates will vary, local regulations will dictate licensing requirements, labor rates will vary & the particular location will dictate insurance premiums since insurance carriers will weigh local replacement costs and whether the municipality is viewed as being a “plaintiff friendly” in arriving at insurance premiums.Better situated assets will attract better tenants.

There is nothing in the original post that stated the resident's situation was anything like yours.  

Throw in the fact that properties over the next few years most likely will have very low to zero appreciation and they probably do not get you a net of $6k a month even if you considered the principal payments you are paying down and lending right now is a far better situation to be in than owning property - just as the opposite was several years ago during very low rates and high home appreciation.