Good post, Dan. I would agree, the areas you outlined are definitely top Oregon Coast destinations... but as you mentioned at the end of your post, regulations can cause serious issues with (1) cash flow and (2) even being able to get a rental permit. A few regulations notes for your top 10:
1. Brookings, OR - Currently regulations are reasonable and permits are more obtainable than most areas on the coast.
2. Cannon Beach, OR - Every single home can get a rental permit... that allows an owner to rent to one group every 14 nights. Renters in Cannon Beach still average 3-4 day stays... so that means in most cases rentals are booked about 20-30% of the time. Cannon Beach, being the most expensive market on the Coast, that means cashflow is impossible... at times that is true even for cash buyers.
3. Seaside, OR - Regulations are getting more challenging, but as long as a home is on the west side of the Necanicum River (or Holiday Drive) and not too far north or south, a permit is possible.... as long as Seaside's density rule doesn't restrict a specific address from getting a permit.
4. Lincoln City, OR - Currently the only viable permits can be obtained in commercial, mixed use, or vacation rental zoning zoned areas of Lincoln City. No residentially zoned properties are being allowed to submit permits at this time.
5. Florence, OR (Yachats & Heceta) - Florence, like Brookings, has a really easy regulations and permitting process at this time.
6. Newport, OR - Due to drastic restrictions enacted over the last few years a very small part of town can obtain rental permits, and the waitlist (as I have heard) can be 3-4+ years long.
7. Bandon, OR - A long and drawn out process that can take a year or two to get through... Also, every STR is required to have sprinkler systems installed (true for all of Coos County).
8. Gold Beach, OR - Similar in easy of access to Brookings and Florence.
9. Port Orford, OR - Similar to Brookings, Florence, and Gold Beach.
10. Pacific City, OR - Pacific City is unincorporated, thus you need to know what Tillamook County's regulations are... Currently, like all North and Central Oregon Coast County's at this time, Tillamook County has a moratorium on issuing new permits at this time. That will likely change (with updated and liely more restrictive regulations) mid-2023.
Bottomline to all of this, regulations should always be the start of the conversation when considering an STR on the Oregon Coast... and often times it can end the conversation as well. Know your regulations at both the city and the county level. You need to call the planning departments & review all their available documentation; do not trust me, or anyone else outside of the planning department to tell you the current regulations... and sometimes you can't even trust what the planning department days, read the rules and regulations.
Be aware that regulations are always changes. Even in areas where regulations changes just a few years ago. Very restrictive regulations have migrated north to south over the last 4-6 years, so while the very Southern Coast is pretty easy right now, you can expect they will get more restrictive like the North Coast over time.
There are areas you can still get vacation rental licenses, and a silver lining for anyone with a permit now & in the near future is that regulations are drastically restricting the supply, but the demand is only going to grow over time... so you could be in for much better cash flow in the future vs. today with the squeezed supply likely to continue.