The Mod is default balanced for x1 Harvest Amount Settings.
Later there will be an easy INI config to set your Harvest Amount multiplier and the system will change the crafting cost based on this setting.
However, i will need time to configure this, the only option right now is the ConfigOverrideItemCraftingCosts via Game.ini

• Harvest Amount multiplier x1 (Default)
  Pastebin [pastebin.com]
  
  
• Harvest Amount multiplier x2
  Pastebin [pastebin.com]
  
  
• Harvest Amount multiplier x3
  Pastebin [pastebin.com]
  
  
• Harvest Amount multiplier x5
  Pastebin [pastebin.com]

In your opinion the costs are way to high / low ?
No problem, change them by yourself, using the default INI option (x1 Settings),
and change the recipe.
You also can use Link [www.nipiro.de]
Use the spawncode and change the recipe to something you like