You also have to deal with different personality types that run the HOA. 

I've been a land broker for fifteen years, and for the smaller pieces I work on, the buyers are extremely random and come out of the woodwork, needle in the haystack types. 

Also make sure everyone you interact with knows you buy houses and what type of property you are looking for.

Research any governmental required benefits such as particular types of insurance that may be required when you have employees.

What I’m afraid of is that this tenant got worked up over something I would’ve considered a small thing and I wouldn’t want to have to deal with these types of responses in the future when rent is late or when something bigger becomes an issue.that being said I also do like that this tenant is communicating their concerns to me.

First off, what type of investors are you representing?

I would also keep an eye on what types of properties, with what features are moving faster than others.

Based on the type of loan your collateralization will be 10/15/35/40 percentB.  

Figure out what type of asset class is your target, go to meetups, build relationships.

As an agent, there are TONS of resources for this type of approach.