One misstep and this is on your record forever. Also, if you file the Expunction incorrectly you could waste precious time and money or even bar yourself from successfully expunging the matter in the future. Contact an attorney for the PI phase and the Expungement phase. Protect yourself. Most lawyers discount their fees if they are getting hired for both.
There are huge variety of factors that would determine the sentence. The facts of the case itself, the criminal history of the defendant, and other mitigating information about the defendant. The strength of the case plays a large role in that weaker cases can get reduced to a misdemeanor regardless of the defendant's background. Mitigating evidence would include personal tragedy and efforts at treatment and rehabilitation. The formula is complex and you need a skilled attorney to sort through...
There is not mandatory jail time for a criminal mischief. I presume that more that $1,500 in damage is alleged to support a felony charge. If the damage is less than $20,000, then you are looking at a state jail felony. The DA could offer anywhere from 2-5 years probation or 180 days to 2 years in the state jail and a fine not to exceed $10000.
What happened in the offense, your background, and how upset the owner of the destroyed property are all factors to be taken into account. You need a...
It is normal for an attorney to charge more money for a trial. It is more work to go to trial than to plea out the case, so the attorney can charge a trial fee. That said, it should have been something that was known and agreed to by you when you retained him as a possible additional fee.
There is no problem moving before a case is filed. That said, notifications get lost in the mail, so it would be even more important to hire an attorney to keep up on any potential court dates and monitor the case status.
Consult with an attorney with a copy of your terms if you are just avoiding the hassle of additional costs. If you are refusing without the proper diplomacy, they will immediately red-flag you as a "trouble maker" and amend your conditions to add UAs or maybe even treatment. It is best to stay off the radar while on probation. Talk to an attorney. Have a plan for ANY opposition to probation.
Once it is expunged, it is gone forever. It is like it never happened. You can also legally say that it never happened. You may be thinking of a nondisclosure where certain state agencies can see that you lived out a deferred adjudication probation, but that does not apply to you. Once your case is expunged, it is gone.
I hate to tell you that you have almost no chance to help yourself. The DA is unlikely to back off from their position even if it is completely unreasonable if you do not have an attorney. You are much more likely to make matters worse. A person who represents himself in a jailable offense like this has a fool for a client. Call a lawyer immediately.
Mere presence does not make you a party to an offense, but if the police believed that you helped in any way however slight (ie. lookout, driver, etc.), they will charge you. Your willingness to cooperate does affect the police and their opinion on whether you should be charged, but you don't want to go in and implicate yourself inadvertently while talking to the police, either. The bottomline is that these matters are too complex for you to figure out on your own. It would be like doing brain...
Prosecutors will sometimes consider dropping a case if you enter the military. That said, this outcome is rare and case-specific. It may or may not be a possibility in your case. You need to hire a good lawyer to work your case and advise you on how to maximize the best possible outcome in your specific case.