grubstake: Supplies or funds advanced to a mining prospector or a person starting a business in return for a promised share of the profits.
n. Money, materials, tools, food etc. provided to a prospector in return for a share in future profits
n. An amount of money advanced to someone starting a business in return for a share of the future profits
File this under “words I wish people used in everyday conversation,” as in “lookin’ for some grubstake to get this film off the ground.”