Thanks again for the reply.
Here's the section of the law that applies to the burglary of an automobile in Mississippi. As you can see for yourself each burglary carries a maximum of 7 years of prison. Additionally, since there are 6 different cars involved here, these sentences can run consecutive. So the absolute worst case scenario would be 42 years in jail.
He has no prior felony convictions, and a 42-year sentence would be much too harsh, but with 6 of them, the DA's offer probably won't include probation, and in my experience, any offer from the state would involve a couple of years of prison. He doesn't have to accept an offer, of course, but he's unlikely to want to try this case. The DA would have 6 chances to get a conviction, any one of which is worth 7 years of prison.
In general, there has to be a change of circumstances for the better for the defendant for a judge to grant a bond reduction. If for some reason, for example, the state isn't ready to indict, that would be a good reason to get a bond reduction. But if there is nothing going on with the case that is in the defendant's favor, an application for a bond reduction will usually fail.
Your friend neds a lawyer. If he cannot afford one, he needs to let the judge know that he's indigent and ask for a public defender.