Never listen to their first offer. Not knowing where you are it's hard to know what you face though. I have been there numerous times,too many according my gf. One time the lawyer told me not to worry she could get me 2 years in minimum. I fired her and got a good lawyer. It took one day in court with him and I received a court order to have 54lbs returned. That was an outcome only money or serious luck can get you out of. My last one with the feds,started out a little hairy. 110 plants,oil, and 8 elbows. I had to plead to poss. over an oz., just to make sure feds did not refile. They set it up after 18 months charges were dropped,not expunged. They let me go home to the ranch. I was told it was best for me to retire so I did. Someone told the feds of my grows,they expected a lot of money,they were pissed and shocked when they found I grew for free. Not a peso passed hands. But here even good came out of it. Five days after the feds came I was supposed to be at the ranch signing over some land. I could not make and put it off. 2 months later we found we could get another million out of the deal. It pays to live a good life. I thanked them for that and for leaving over a lb of hash for me on the coffee table. Helped my back out when they finally let me out. They stashed my ass for 18 days, putting me in locked down units and then medical quarantine.They did that to watch my phones and house. And people bitch about mex.
If you can I would pay for a lawyer and work it off rather then sit in jail. You are in a country where you you can buy your freedom. OJ did. JK
Best of luck to you.