How valuable is this location in that market? 

Alas, this scenario didn't last very long, as you would expect in a free market capitalist society -- new money flood in, more STRs in supply, property prices increase, STR incomes decrease, until a new equilibrium is achieved.Nowadays, the word STR is being used to describe both the property and the business.

I’m Mark, a new real estate investor based in San Diego, leveraging my background in AI-driven lead generation to find off-market deals.I’m currently looking for small multifamily properties (duplexes, triplexes, or quads) to rehab and house hack, to build long-term cash flow while living in the property.Outside of real estate, I’m into fitness, golf, and exploring San Diego’s best outdoor spots.

I’m looking to invest out of my home state, Texas, and have narrowed it down to 3 markets.

I recommend you discuss and plan this in depth with a local lender who knows your market well. 

I'm calculating which markets are the hottest and going after them. 

I'm not super familiar with the real estate market in Couer d'alene like I am with East Idaho or even southern Idaho or the Treasure valley.

But for the best local advice, make local connections in the market with Host groups and Rental Associations.

Don't do real estate over the Stock market.

Engage an investor-focused realtor/broker in your preferred market (this is not a residential realtor) and start 'tire kicking' the market and properties that fit your criteria.