We still have more demand for rentals than supply.

However listings have been way down since March so the supply has been reduced.  

Inventory has continued to be in very low supply, especially affordable homes.

I have about 200 hedgeapple trees in my yard, and about 800 other assorted trees so the wood supply is basically endless.

I might call a roofing supply and ask what and who they'd recommend.

We also lend them our VIP discounts for HVAC, plumbing, etc.. as well as supply stores.

@Angeline Rebottaro, I'd recommend leaving wet wipes or cleaning supplies for guests.

Since this is going to be our first purchase, we are specifically interested in buying a four-unit (to maximize leverage through FHA), preferably on the peninsula.We have been doing research, reviewing past sales, and observing the market for about 3-4 months and understand that the supply in Portland has historically been low, so instead of only waiting for MLS listings, we decided to ask around to see if there are other ways to connect with potential sellers. 

Or the specific supply houses (Eg a roofing supply house will probably refer you to some reliable local roofers) 

Is there an over-supply of cheap housing in your area?