The best time to have a quick injection of a lot of money is at the beginning of the game, especially if you are asset-heavy. If you mulligan for this or it comes up within the first few turns, you're in for a good time. Play your expensive cards, and the rest of the game will be easier. If it comes up later, maybe don't play it. Anyways, you'd better have a plan to get the money back. The best way is to either play an investigator who makes the money back passively or is rewarded for having stockpiles of cash (Jenny Barnes, Preston Fairmont, Bob Jenkins, Monterey Jack (EDIT: Monterey Jack obviously cannot take Rogue level 3 cards)), or is asset/skill heavy where you just don't need to spend too many resources past putting down your key assets. Event-heavy Rogues are probably going to spend all of their money no matter how much they get. If you do need help getting the money back, the usual suspects like Hot Streak and Faustian Bargain are fine, and The Red Clock, Lone Wolf, and Investments will get you the money back eventually, but a special mention for Cheat the System, which cares about assets in play from other classes, and hey, this one is also a Survivor Card.
Speaking of, do any Survivors besides Bob Jenkins really need this? Survivor is, after all, the class that has Dark Horse. Wendy Adams can use this to pay for Leo De Luca, and with Pickpocketing (2) and other Rogue economy cards can make the money back. Rita Young can take Trick cards, so that means Easy Mark and Sneak By are on the menu, and she may want this to pay for an early Pilfer or two. Daniela Reyes may like this to put down some expensive Guardian assets or in Survivor, Aquinnah or a Chainsaw. But paying the loan back may be a challenge with Survivor cards. You can stop playing events or assets and build up your resource pool slowly. Maybe a key Drawing Thin or Take Heart will help. If you have time at the end of a scenario take the resources with the basic action yourself, or maybe get help from a friendly Guardian, Rogue, Seeker, or psychiatrist. Of course, taking Déjà Vu to mitigate the forced Exile may be the answer.