Areas to target as a wholesaler in So Cal?

[Liz Spencer]

I am a RE wholesaling newbie and I recently heard that one of the most important parts of sending your first mailing is to target an area with a good amount of investor activity. This seems pretty intuitive, however, I'm curious as to how you find this information?

I understand networking events would be helpful, but is there any way to identify a specific county where one could start? I have been debating between Orange County and Riverside, leaning towards Riverside, but have no actual data to anchor this hunch down to.

In other words, where do I start here?

Appreciate all of your help!