Hi Joseph, I've faced same problem when moved to the US. I live in San Diego right now, but was looking for place elsewhere in California to start my gaming company.
The fact is that you have to have a proven record (name or games that already make stable income) and proper funding before you can start. I've been attending lots of conferences, talked to many angels, but they all said same thing: unless you have a packed team and working project (means you make stable money from it already, or at least have over 1 mln installs, or know exactly how to acquire users and monetize them fast, you won't be able to get investments here. No one cares how good your game is and how many years you've spend on prototype. If you don't have a plan for this game and audience that will make ROI fast - better to start on your own until you'll get to that point.
As for developers, if you are going to make a startup you always have 2 options:
1) Hire someone overseas, which is cheaper and sounds better for startup, but always has pitfalls
2) Hire local guys and put them into office, which will require proper funding since devs here 3-5 times more expensive then in some countries.
The decision is simple, if you have money - get locals, if you don't have money - go with virtual office and team overseas. I personally have over 4 years of experience of working in virtual office with guys all over the world, and I successfully managed such teams despite timezone differences. But if you don't have someone who can do that for you or you can't do it, it's always better to go with locals and put them into office.
Obviously California is the best place to start gaming company, but I know that there are lot of mobile gamedev companies elsewhere around the states, Texas, Washington, New York etc.
When it comes to starting a company, you should think here 10 steps ahead. As for example California is very expensive in taxes, that's why they incorporate in Delaware or Nevada which are the cheapest. Then regarding the type of company, LLC vs corporation. If you plan to raise investments you better go with corporation cuz as far as I know you can't do that with LLC, but LLC is way simplier to open and it suits better for startups seems to me.
And again about investors. Before you start thinking of contacting someone, you better prepare very well, you have to have a solid plan and strategy for next 5 years as that's what they might ask you as well as tons of other questions regarding your competitors and other stuff. So you better have all answers prepared ahead.
You can contact me if you have more questions. I'd be glad to help. You can find me on Linkedin or my email is paul (dot) okeslenko (at) gmail (dot) com
Wish you all best as I completely understand your situation.