I tried one in Oregon on a 120 door parcel I had over in Lincoln city..

You state the numerator is “units in the area” but that sounds like existing units, which is what’s calculated in Step 2.

Whether you're looking for short-term rentals, long-term rentals, or fix-and-flips, Florida has something to offer.Favorable Tax Environment: Florida boasts no state income tax, making it an attractive option for investors looking to maximize their returns.Year-Round Appeal: Unlike seasonal markets, Florida offers consistent rental demand year-round.

SF is a very unique market, and actually may be a great time to buy right now, especially if they can successfully turn the city around. 

Looking at the numbers today (keep me honest), I believe you can still find deals with 5-6% yield (current rental state) and hope that it goes up.

The city has a lot of momentum with major developments, population growth, and continued investment in infrastructure.That said, it’s not without challenges.

2. how to know where to find a B,C,D areas\neighborhoods in cities\ countries.3. how do I know if a property is worth the checking\ buying?

Even the main city of Malaga, who was considered a backwater city just 10 years ago has become very popular and is now turning itself in a little Silicon Valley and banking center.

Talk this over with a lawyer because under current state law, you will not be able to evict due to the cold.

It's not like here in the states.