Establishing Residency

Get the UPS box and address set up.
You need 2 forms of ID like birth certificate, social security card, passport, CA DL if it contains a RealID marking.
You also need 2 residency documents listed here: http://www.dmvnv.com/dlresidency.htm

I would suggest going to the "Escapees RV Club" web site. They have all kinds of info on the subject.

You may be able to establish legal residency in many states with a mail forwarding service but your problem will be California.

If you stay in the state (CA) for more than 1/2 the time following your establishing residency in another state California will still consider you a resident.

You said 6 to 10 months to move out of California so you will still be a resident of California. Your purchases of fuel, food and entertainment can and will be used to show that you have not left the state.

Your best bet is to just stay a resident of California and when you leave it will be a clean break. You can still start with a mail service if you want but may be just extra time and money.


JimR

There are some mail forwarding services there, sorry dont know the names. Bob Wells of You Tube's Cheap RV living has done a video on his use of Nevada and why. you may want to search for that. He does also talk about health insurance.
Most folks also check out
www.escapees.com
They predominately push Texas for Domicile, but they also cover South Dakota and Florida, lots of helpful info.
Good luck.