State Farm allows you to take the unit out of service for up to six months. The comprehensive stays on the unit (fire, theft etc). The lien holder still has his rights protected (if you have a lien holder). A simple call to State Farm reinstates all coverages in less than 5 minutes. Talk to your agent for the details.
By the way I am not impressed with your agent because he did not tell you about this feature it is his job. I use State Farm myself and that is one of the first things my agent told me to save me money.