The grass might not be greener and maybe you should keep the better paying job, but you should keep in mind that living a life filled with stress is like eating a little poison evey day. It's not a huge deal, each individual dose, but it adds up.

Stress hormones do their own damage, but also - when my mental health sucks, I don't bother to put on sunscreen. I don't eat right. That adds up, too. Of course when money's tight, you can't avoid stress. But even if you don't change jobs now, you should probably be looking to change something soon. You're at an age where the consequences of that stress will start to pop up. Me too.

I don't know if you should take the new job, but I do think you should consider your mental health a high priority. Under money, maybe, but other people have given good advice here on various pros and cons to consider with that.