I just have a couple of points to make that are not advice and not at all trying to tell you how to live.
1) My brother died from a sudden illness (genetic, but no known predisposition in our family, e.g., unavoidable) in his 30's with four young children. Stress was really bad for this. Accepting significant stress and burnout now for only a possibly low-stress future is not necessarily a good bet or trade-off.
2) My dad was a workaholic because he was worried about money and retirement and being the "invaluable employee" when I was a kid. He worked often until late at night and on weekends. He came to lots of my games and stuff, but he always missed everyday life. Always. He and his mates were all eventually "downsized" from his high-paying job at a Fortune 100 when they sold off his software development unit to a competitor when I was a late teenager. He realized he fucked up our relationships and was fucked up himself by the lack of work-life balance, and took a job that was less demanding and of course paid less, but it was already pretty late by then. I was maybe 17 or so already. You can't get that back, and our relationship was never the same as when I was really little.
Anyway, a fat paycheck is nice, but there are other nice things in life too. I hope you do what is right for you.