Also, if you want to place a fresh produce stall on one of your own lots, you will need to use the bb.showhiddenobjects cheat and then look in debug items. It is not available from the normal build/buy catalogue.
Just a word of caution, though - the stall does not work properly on every kind of venue. Sorry that I can't be more specific about when it will and won't work - I haven't worked it out for myself yet.