re: Reneging on a job offer

I had this same problem about 19 years ago. I had got a big promotion but had to move to New York City. I thought I had bit off more than I could chew. Just a country boy from bum frick Louisiana going to one of biggest cities in the World.
I must have walked in and out of my front door that morning twenty times.
I was 22 years old by myself traveling all over different sites. I thought I was going to get killed out there .
It became the biggest point in my life . It was such a huge rush to be out there against all odds. Every little accomplishment was a a huge victory in my perception.
In short, do it . You can always fail and move back. Challenge yourself!!