Extreme frustration

I am fit to be tied! I have worked per diem for an agency on and off for approx. 2 years. One of the facilities I've gone to through this agency is hiring right now and I would LOVE to work for them. It's an awesome unit and I actually enjoy going to work there. I asked my agency what the procedure would be if I wanted to sign on as staff at this facility as I am aware of non compete clauses and the such. I found out today that not only would the facility have to buy out my "contract", but I would not be able to work there as staff or agency for 90 days. The recruiter informs me that I can work somewhere else through them for the 90 days. Here are just a few of the problems with this scenario:

1. I'm per diem and could choose not to work for this agency at any time. Why am I considered a 'contract'?

2. What if at the end of the 90 days they are no longer hiring? If that were to occur I would be out of a permanent position AND it's possible they would be fully staffed and no longer need to use agency nurses.

3. This agency has not been able to book a shift for me anywhere else with the economy the way it is. So I would basically be forced out of work for 90 days.

Is there anything I can do to help the situation? Has anyone else experieced this? Any input would be appreciated.