Deployment

Every time that my husband deploys there are some life altering decisions that need to be made for “just in case”. A couple such decisions are if we need to change the wills, life insurance or any of our investments. We would be covered by insurance if during the deployment my husband was killed in action but we do not know how soon the money would come in. If we put money into an annuity fund while he is deployed would we be able to count on that money right away if the family needed an additional revenue source in the chance something happened to him?