Tink bag would indeed let you hold more loot to sell, but the fastest way to making money is to level - and a good haste item will have you leveling faster. If you're in the right place a right time you could potentially get a fbss for as low as 6-7k - realistically they usually go for 8-9k.
5/55 rings, a good but inexpensive weapon and a haste item will get you a long way as a monk on a budget.
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