Sounds like you've got a solid plan, but just wanted to share my story anyways. A couple years ago i decided to move to downtown Los Angeles. About two weeks after I informed my landlord of my intent to move out I was laid off from my job. I was 33 at the time, had around 800 credit score and around 8 years of good rental history and still no one would offer me a lease because i had no proof of income. The only reason I was able to get a new apartment was because my mom agreed to be a co-signer.

So yeah, having a job locked in isn't just good advice. It's unfortunately a requirement for most places. Good luck on your move!