Some years back in a long-defunct heroic campaign, I gave some thought to dropping money tracking but never fully fleshed-out the details. The basic idea was to figure up a character's annual income by perk and complication and allow any purchase up to 1% of that figure as "free". As purchase prices increase, a roll would be required to complete the transaction. A roll bonus would apply to purchases that only slightly exceed the "free" level, dropping and changing to penalties as the prices rose. Also, the bonus/penalty would get worse for each subsequent transaction within a defined period (about a month, I was thinking). Failing a roll would not exactly cut off purchases, but the next roll would be 3 levels harder not just one. "Money" gained in an adventure would be in the form a favor-perk, redeemable as a single no-roll transaction (one or a set of purchases) up to the monetary value of the favor.