NOTE: I'm in contact with a reputable broker and the numbers they're claiming for repairs and ARV are SO MUCH better than what I'm using here, but I thought it's fair to pad the suggested numbers as I have done with the above also.  

I think it makes most sense to create a buyer's list, and then move to contacting prospecting sellers.

If you have a marketable property and its listed these agents will contact you.

One house on my street, I contacted the fraud division of the mortgage company.

How do I find contacts for contractors and agents in Portland?

We use Smarter Contact, been using it for 2 years now.

I've had a long career in community development and have a lot of bank contacts that would likely be interested in investing, but I'd need to prove the concept first with an initial fund (there are also a lot of other community development tools that could be leveraged to maximize and scale this).

Make sure the previous property management company did their job and communicated a change in management prior to you taking over--along with your contact information.If they have no done this, they should so the tenant doesn't feel like a scam may be going on.Just make sure they're away of where rent payments need to go and who they can contact in the future. 

You find a Realtor in the market you're looking in and you should be able to lean on an investor-focused Realtor for property management, lender, and contracting contacts.

My contact info is below.