It may depend on the manner and nature of the threat. Evictions are fraught with potential problems for landlords. In a situation where there is already a conflict, the wise route would be to sit down with your attorney before taking any action. A physical threat against you might be treated very differently than a non-violent threat to enforce what the tenant perceives as a right under the lease, such as a threat to call the Health Department. I do agree in keeping it simple....
Generally you post the 10% and remain liable for the the 90% balance. The majority of the amount posted is refunded once the case is over, as long as the Defendant makes all of their court appearances. To find out, call the Clerk of Courts office for the county of the arrest. There is a state fee that was part of the amount posted. This is a separate amount and is only refunded if the case is dismissed, ignored by the Grand Jury, or the defendant is found not guilty.
To answer your last question first, your husband needs a lawyer now.