The pitfalls I see investors make are not having enough reserves when issues arise (HVAC, storm, etc.). 

Post little articles providing solutions to issues homeowners face. become the authority when it comes to anythng  "problems" homeowners could have.Get a business phone number, get a business email.

the issue of construction when I asked the Insurance Broker for a quote. the as price is good. 

Your partnership distributes ("passes through") your STR losses to your respective personal tax returns via K1s.

If you and your owner's values are not aligned, there will be a lot of issues down the road. 

Whenever I have an issue with financing, I normally contact local institutions.

During the pandemic, I had no issue with getting rent on time.

For an example of what I'm concerned with :  My tenants are actually really good, but right now I have an issue where a friend of a tenant literally just drops trash out the window!!!  

That said, many of the issues you pointed out have more to do with the policyholder than the product often times and ironically are parallels to what I'm certain to be issues many of YOUR clients face (inability or lack of desire to understand finances, nuances of financial planning, budgeting, investment options, taxes, retirement planning, estate planning, etc.). 

She is using financing, and we have a few issues.