I am in Portland as well it can be a hair tricky to manage there are some rules about asking tenants to leave there are also limits on rent increases see below: https://www.portland.gov/phb/rental-services/renter-relocation-assistance#toc-when-is-a-renter-eligible-for-relocation-assistance-Have you already purchased the property?

Feel free to shoot me a DM and I can point you in the right direction of a few.

I am planning to move into the home for at least a year once the existing tenant's lease is up in a month, and I intend to keep it as a rental for the foreseeable future.

James and I have talked about this in other threads. 

We have had more than one appraisal where the appraiser gave a rent projection more than what a local Property Manager could rent it for.

He sent me 100s of deals and I told him no 100s of times.

As a student of history and electoral politics, my hypothesis was a flat no, and the research did verify at least most of my assumptions.However, I could have written a book about this topic, and I really don't think I can answer the question succinctly enough in 2,500 words.

Hello, my real estate investment partner and I are in talks with a party about getting a $1-2M promissory note in place, which we would draw on to make acquisitions of 12-25 single family homes over the next year or so.

Another option is finding a deal where the owner will seller finance some or all of the down payment portion and is okay being in 2nd position.

You could do #1 since we have done that with self-managed properties.