What are my rights if my vehicle was seized when my roommate took it, he has no license and got a DUI?

My vehicle was taken without my permission and the driver is being charged with DUI. I am not sure if it matters but I live in a mobile home park which is private property. He did not leave the park. Same thing happened 2 years ago but vehicle was on city streets last time and caused damage to others vehicles/property. None this time. I have talked to the police and they said I could get it back today for $3500. I have no way of coming up with that. They said they could get 4-5000 if they auction it, and I’m getting a deal. I’m not even positive he took it right where I parked it. Police said they saw him driving it. I have not made any statement. Now the guy is on the run, so hasn't been formally charged. I need my truck for work. I pull a trailer with it. I’m really struggling to pay my bills right now and lost out on 2 day work because of this already. I want to be sure to say the right things when I talk to them. Roommate was on parole, so going back to prison for sure, but who knows when court will be since he fled. I need it back ASAP and can’t afford an attorney. Please help. I tend to feel intimidated by cops, just need to know best way to proceed.