Make sure every phone call with your brokerage is recorded (two party calls only or make notification of recordings if more than two parties involved) and every email and text is saved.

In your case it would be clear that the tenant would be charged to clean out the septic system.

There is a calculation that takes place and usually involves market based investments.  

Ask about any unforeseen challenges that have come up (there always are, so not all challenges are a red flag), and overall let them know you're an involved LP who likes to be kept up to date on things

However, since we are staying out of the country, we would like to look for a reliable airbnb property management companies to do the end-to-end management from task i.e. listings, fixing a broken lock, get the house clean, liaise with guest etc.Any recommendation?

The final part of my degree involves a capstone project, and a requirement of the capstone project is that it be overseen by an industry mentor.

Lead Free involves more expensive tests and has a higher standard, but you're "one and done" in terms of licensing and registration.

When I looked at his record before signing it was clean.

For your first project it is nice to be able to see it, talk with all the people involved, know the area, know the schools, know the employers, know the neighborhood, meet your trades, etc. 

and see what skills you might have to add some value as a side hustle.Things started to happen organically as I got more involved in the Chicago real estate market, and I am confident they will for you, too, in Seattle!