If you want to buy an hold a 3 bedroom, 2 bath and your budget is $200,000 then you know to completely stay away from certain markets.Then start researching general markets/regions/cities. 

Developing connections with local real estate agents might also help you receive replies more quickly.Connect with local professionals by going to networking events and meetups for real estate in the region.

You would be exactly correct - in 2009-2010 there was very little change to tourism in the area, and ease of access (and overall affordability of the region) seem to be obvious contributing factors. 

Attend REIA meetings not only in your target investment areas but also in regions where potential out-of-state investors are based, Use LinkedIn to connect with real estate investors and groups.Engage in real estate forums like here in BiggerPockets, where many investors, both seasoned and new, gather to discuss opportunities, seek advice, and network. 

West Sacramento really varies with several very different regions.

Also, Trachte puts on regional seminars every year too.

Also any good RE agents in the region. 

Perform in-depth market research to pinpoint regions with diversified economies, job growth, and solid economic foundations.2.

At one point, I was close to buying a condo in region-15 but dropped out due to lack of infrastructure.

I also think that the numbers might vary GREATLY from region to region and market to market.