I was in the same boat as you 3 years ago... Right down to the Bachelor's in History. Since I didn't have any pre-reqs completed either, my family suggested I become an LVN first so I could at least start working in the nursing field while I completed my pre-reqs. The LVN program took 1 year, but it took me 2 years to complete my pre-reqs at a CC. I took only 1-2 classes per semester due to the difficulty in getting classes -- I was wait listed for all of Anatomy, Physio, and Micro, but was still lucky enough to get in. Because I had so few classes, however, I was able to work full-time hours as an LVN. I'm now in an LVN-ADN program and am expected to graduate in May. I'm also currently in the process of applying to RN-BSN programs for next fall. My LVN program cost less than $5000 at an adult school and my ADN program will cost me no more than $3000 by the time I'm done. I've paid about $2000 so far including uniforms and other misc costs, but I still have a semester to go =P The RN-BSN programs I've applied to should cost me no more than $15,000 total since they are CSUs. So, to get my BSN from the same position you're in now, I would have spent no more than $23,000 -- a HUGE difference from $100,000.
So... the option I'm throwing out there would be to go into an LVN program at a CC with a bridge program. This will 1) help you accumulate units at that CC that counts towards priority in registration for your pre-reqs and 2) knocks out your first year of nursing school
regardless of whether your choose to work as an LVN or not. I have a few classmates in my classes now that did this.