Can I make a genuinely fun game about a cafe in which you make hundreds of different foods with skill leveling, magic (water/fire/earth/wind), an NPC party, adventure quests to find certain items (like...most quests), upgrades for your cafe, equipment, etc. that you would normally find in an RPG without including combat?
Why not? Recettear has the dungeons, but they aren't required. The friend who introduced me to Recettear beat it without ever doing a dungeon.