This achievement can be done literally in a single deposit about an hour after the start of Chapter 2
You’ll first need to get to the point where you can free roam anywhere you want around RDR2’s map. Afterward, you’ll want to complete 2 very specific treasure hunts that will earn you $3500
before even touching a story mission. By using $1500
you’ll also be able to completely upgrade your camp to the max and unlock powerful tens and even Fast Travel
which is a must for this game.
To upgrade your camp and deposit the money, simply walk up to the box outside of Dutch's tent.The Poisonous Trail Treasure HuntStrange Staues Puzzle Guide