Mr. SepAnx,
Without hesitation, my advice is to stay with your child. Those years are precious and irreplaceable. I had a tough year where I was gone and working a lot. SHAKES HEAD IN REGRET
On the day you die, you will only wish you had that time back with your baby girl.
From the kid's perspective, she wants you around more than she wants a better financial situation. My dad worked a lot to get ahead and eventually achieved a large income. I have these few awesome memories of just a few days we got to do fun things together: skiing, the beach, sailing. By the time I graduated university and moved on, we didn't really know each other. I feel the loss.

As long as you have the basics: food, shelter, a safe home, she will be happier having more quality time with you. Great job, Dad!