Requirements for maintaining crafting level

Make Gold (Android) Hearts, the Recipe is a measly 15 Gollux Pennies (Blue) from Randolf, and it requires 3 Gold Plates, 4 Advanced Item Crystals and 1 Superior Abrasive. Out-of-pocket, not more than 1M if you buy everything overpriced; only 50K mesos for the Superior Abrasive if you Evolution World for mountains of Gold and also extract the equips you find.