For example asking for minor upgrades to the unit but in a way that blurs the relationship boundaries.

Having a relationship with an investor friendly and proactive Realtor can't hurt.

Then I would focus on growing relationships and building your core 4.

In any relationship, business or personal setting expectations up front can make the difference between success and failure.

What kind of relationships do they have with maintenance groups or individuals?

I've developed some great relationships and also a business partner from these meetings.

It will also allow you to build relationships in your local community with tenants, contractors, real estate professionals, etc. 

I agree, I think great communication is probably the cornerstone of a successful property manager / STR owner relationship.  

*This post does not create an attorney-client or CPA-Client relationship.

Plus, it helps me build a good relationship with the seller, which can be handy when it comes time to talk about the price.How I approach the property tour depends on a few things, like how the property is being sold and where it's located.