There is a river of hot water by the hotel Tabacon in San Carlos that is an absolutely unique experience.  

Picture this: 3 pools and hot tubs, a dynamic game room, a versatile venue, pickle-ball courts, outdoor theater, mini-golf, and more.

After months of blood, sweat, and bargaining with contractors who seemed to vanish into thin air, I finally flipped it for $180,000.

Oh very interesting, I'll have to check the planning commission meeting notes because this was a hot topic in Denver the last few years so if it was discussed there on public record I'm surprised it wasn't in the news at all before!

But if you were to use it as an air bnb or ir it is raw land that you can generate income from by farming or renting out to farmers or grazing that would certainly work.

Its my understanding that SF has pretty tight Air BNB restrictions like you have to register and can only rent them a certain number of days a year?

San Antonio is hot in the summer.I will compare my return on San Diego purchases against any market, but if you plan to buy rent ready, I think many markets will beat San Diego in the short term.  10 years or more out, I suspect few markets will beat San Diego.  

Just be the absolute best host you can be for the first year -- communicate clearly and quickly, make sure cleaning is top-notch, make sure all amenities work (hot tub is hot, TV remotes have batteries, etc. etc.)

Ultra wealthy to me is the exact opposite of what got you there.  5/3 house in Nice and another in Buenos Aires.  

You can make minor adjustments based on the type of appliances (dishwasher, clothes washer and dryer, air conditioning, etc.) and the size of the rental.