There are way to many PM's not getting properties rented and they are staying vacant, there is also way to many rentals being rented less than market rent to get a "quick tenant" causing investors to lose money, you will also need that PM to be completely productive and quick to the applicants and also not trying to incentivize off of your property needing repairs.

As importantly for investors is that operating costs for oceanfront or ocean view properties in Oregon are generally considerably lower than in comparative states. 

No way a newbie just happened to get a prop they can DOUBLE their money on in 5 months.

Hard money How did you add value to the deal?

What is the safest way to store the money and keep it liquid?

I have come to learn that trying to understand the space time, money continuum that most contractors operate in is a fool's errand."

I would not waste your money!

Don't overthink it, househack if you can to start, keep educating yourself and saving money and you'll figure out how to buy the next properties afterwards. 

Happy to send an intro.Roofstock offers a lease up guarantee and a 30 day money back guarantee on all properties. 

I will contribute money for buying and renovation, and the partner found the deal and will do management of the project, split is 50/50.