I agree with everything said above. I have my masters and work as a scientist and my job is just fine, but what I really crave is flexibility. I want to be able to work less and still make the same amount. My husband and I are really happy with our income level right now, but we are living off of 50% of our income in order to purchase more properties. Because I want more flexibility 9 months ago, I thought about going back to school to be a nurse. I could get my degree in 12 months and it would increase my income slightly and be a great long term option. After lots of self scrutiny, I realized the reason I wanted to be a nurse was for a sense of security. Real estate sometimes doesn't feel secure (especially when you are starting out). I wanted to be a nurse because it would provide long term for our family, but not necessarily provide more happiness or add joy to my life. I am so glad I didn't drop the 40k on school for a sense of security for myself.
I would encourage you to really write out what your goals are in life. Or talking with a close friends if you are a verbal processor. If you pictured your perfect life what would it look like? How much would you make? What would you be doing? Then try to make a map for how to get there. Ultimately only you can decide if that includes school or not. Don't be afraid to swim upstream. Good luck!