I'm starting my dissertation for my PhD, so I'm all for higher education :-)
I applaud your desire and your planning to take charge of your career.
What I would suggest is doing a lot of research now about the type, location, and pay of jobs available in the field you want to enter. You want to be as sure as possible about the opportunities waiting for you when you finish this journey.
I don't regret my time and money spent pursuing my current degree. I have learned so much and this will be a life goal that I will meet. I do wish that I had done more research. I am now finding that many of the best career opportunities available would require me to relocate. I am not willing to do that because of my family situation. I still believe I will benefit from my graduate degree, and find work locally, but my tendency to jump into really big efforts (six years so far of classes!) with more intuition than data (surprising because my degree is all about data/research??) is leaving me feeling a little stressed now.
Once you've done your research, though, why wait 3-4 years to start? My daughter was 2 when I started and I was working full time. Once you are clear on your plan, go for it!