I would definitely look into property managers, but interview a few and call references and ask probing questions to really ascertain their skill set.  

Some markets it's easier than others and requires more skill. 2009-2011 was a very easy market, don't know exact % that purchased but I would say 90% who bought during those times have equity, a fair estimate.

They tend to have general info and knowledge of various asset classes but do not specialize.Those nuances and deep expert level knowledge from a specialist makes all the difference in the world when you are buying a property in the millions to tens of million of dollars in purchase price.For instance in retail commercial I have specific commercial attorneys I use that have specialized skills like I do in a specific asset class.Hope it helps.

You use these properties to trade in order to acquire the light blue properties and the orange properties.  

This will be an ongoing discussion, so we just need to iron out a few details before BP members begin assisting you.1) Do you plan to hire a General Contractor or coordinate the trades yourself?

In this asset class, most parks usually do not hit the public market, so building relationships will be a valuable skill.

Agent-owned, publicly traded company (ticker EXPI).  

In that program there should be a strong focus on the 5 skills needed to be a Pro at Wholesaling.

Will anyone in the Seattle area let a newbie volunteer with them or their Real Estate Investment entity in exchange for learning the trade?

I would research until you have found what your skills, expertise, and network bodes well with, and dive in full force.