I am both a Chiropractor and a Nurse. I live in Alaska, so I fortunately have good options as far as either go.
However, these are my thoughts and mine alone, others may think otherwise.
Chiropractic offices rarely offer health insurance, decent vacation time, holidays/etc. Plus, if you want to work for a government or state position (VA), it's nearly impossible as a chiro. So you'll have to pay those 150k in student loans off for quite some time, out of pocket with no assistance (which is what most do, no issue in that). I ended up working 7 days a week for 3 years at my office and never got to see my wife or go on vacation. I made decent money, but with billing and all the denials these days, it made it such a pain.
I got my RN for 5k at a community college and make as much as I did as a chiro (around 100k) and work half the time. I have full benefits for my family and I'm in the public student loan forgiveness program that will forgive all of that debt (tax free) after 10 years. Retirement and pension are on the table and all other stuff, like life insurance, is covered under my position. I have 7 weeks of vacation/per year and I can get a $20k sign on bonus every 2 years.
Something to think about.