Talk To Me: I want to leave my dead-end job but retraining is not an option

I dread the thought of going to work almost every day.
I'm in a dead-end job with no prospects of promotion. I want to get out, but I’d probably need to retrain. My wife works part-time, and we have a two-year-old child and a mortgage, so time out to learn new skills is not an option. I have a happy home life, but I dread the thought of going to work almost every day.