I would look into house hacking.

Hey there, I'm looking for anyone who converted a house to a co-living setup in Oregon or even more specific, SW Portland in Washington County.

Also, check the amenities available, that will run the HOA dues too.Location-wise, check whatever will be easier to rent in the long run.Also, depending on how you're comfortable with sharing your apartment, 2 bed could be a great house-hack.

I hear Section 8 takes time for your house to be inspected and approved.  

You need to look at the last six months of sales comparable to your  ARV house. 

Another strategy we might also implement would be house hacking that next house, to reduce how much cash flow we would need.Thanks!

Just think about the worst damage a tenant can cause, such being liable for setting your rental house on fire or burning down your rental house and the neighbor's house, etc.

Furnish Finder, corporate housing sites, relocation companies, etc?

This isn't going to go well unless the house you bought is in one of the A-grade suburbs.

There is also plenty of other ways to get business, you can do open houses, use social media, door knock, etc.