Spend the $160. It will be worth twice that much in piece of mind knowing your stash is "safe". Make sure you discard all items with strong odor (perfume/cosmetics etc. the shelf life will expire in storage anyway.) Do not store any "liquids". Wrap each item separately in a sealed plastic bag, removing all air prior to sealing. Then put all sealed items into another larger sealable plastic bag, removing the air prior to sealing. Do not leave any personally identifiable information in the the contents of the storage container. The container should be hard-sided and not contain any glass, or any item that could arouse suspicion if the case is dropped or shaken. Pay for the entire storage time, in advance, in cash. Use your initials for your first name. Do not list a forwarding address. Make the sides of the storage container at least 4" less than the compartment it will be stored in. Do not store anything inside that is not in the original container with the ingredients marked clearly on the box. (like baking soda, etc)
Use a commercial padlock, never a luggage key of any kind.
Just a thought...lol