This trophy should come naturally as you progress through the game. A big help towards getting to this value is spending money on every skill trainer you come across as this gives you permanent skill boosts as well as spend a lot of Gold. Loot everything and stealing and fencing items are also a quick way of reaching this goal (as you will have a lot of gold to spend).
If you do not find yourself saving or spending a lot of gold, a quick way once you have over 200,000 saved up is to head to the town of Mel Aglir, locations east in the Plains of Erathell. In town there is a shop called "Kandrian Goods". Among his various goods are typically 2 Chakrams for sale, one is 219,000, the other is 213,000. Just be sure to save before you purchase and once you buy one of the Chakrams, the trophy should unlock.