Just kidding... :chuckle
Seriously, must we "settle down" and choose one career for the rest of our lives? I don't think so. I understand the costs involved with furthering education, so that's always a factor. However, people change careers all the time these days, and I think that's great. Furthermore, not every career requires going into massive student loan debt and oodles of time in school!
(climbing down off my small soapbox)
I think it's wonderful that you are interested in more than one field - if nothing else, it gives you options, choices. Cherish your multi-talentedness!
Have you thought about pursuing a joint BSN/MBA degree? There are some schools out there that offer the combination, and you could possibly combine your healthcare dreams with your talent for numbers.
And just remember, if you decide at whatever point in the journey that nursing (or whatever field) is not the right career for you, you can always change. Really. If it's a deep-down, stongly held opinion that you really, really don't want to do it, then don't! But pursue it now with all the gusto you can and enjoy the journey. And don't EVER grow up