Facility vs ground transport pay comparison

Hello all,
I have recently accepted a new position as an RN on a ground transport team (critical care transport ambulance). My prior position was as a staff RN in a hospital that gave us excellent pay and benefits. An existing, privately owned, transport company expanded into our area and approached me about hiring on with them when they were staffing the new station. When I accepted this new position, a lot of promises were made regarding education opportunities and compensation package (pay and benefits). The reality has become that the company is now backing off on most of the promises. They are now reluctant to pay for any CE's or recerts and have taken the promised pay raises after probation period and the health insurance off the table. They also are not offering any vacation or retirement benefits. Myself and the other RN's on our service are becoming frustrated with this.

My main question is how your pay as a transport nurse compares to working as staff in a hospital. I calculate that I took a 30% pay cut plus loss of benefits (no health insurance, vacation time or retirement). Is this normal for the transport positions?

Thanks in advance for any advice or information.