I rented out the additional bedrooms to friends and family, charging them well below market, and sold when it was time for my wife and I to start our own adventures.

I have used AirBnb's pricing as well as VRBOs.  

If they will "cut corners" by not getting licensed, how well will the quality of work be?

A well written management contract should clearly spell out what is expected of both the PMC and the owner, to PROTECT both and avoid misunderstandings.

This has been our primary business for well-over thirty (30) years, but in California ONLY.Few posters here are attorneys, let alone licensed to practice law in Hawaii.

I will put a flyer with my card on there door as well.

It is also the seller's fault for accepting it, they full well knew this was not right.If you were to file for eviction for non-payment of rent, you'd probably win.

Now a "Foriegn National Mortgage" has similarities to those mortgage types but you will pay a higher interest rate and be required to have a higher downpayment as well (usually about 35% down). 

Paying this off is the start of learning how to invest and live well.

AirBNB is still a good place to find MTR tenants as well.