tighten the purse strings

common purse

A shared or community fund.

cut one's cloth to suit one's purse

To settle for less when money or resources are limited.

hold the purse strings

To be in control of spending; to have financial power and responsibility.

lighten someone's purse

to take money from someone.

loosen the apron strings

To allow greater freedom (to someone); to relax control of (someone).

loosen the purse strings

To increase spending or allow increased spending; to relax control of spending.

make a silk purse of a sow's ear

To produce something refined, admirable, or valuable from something which is unrefined, unpleasant, or of little or no value.

no strings attached

Without conditions or obligations; without a catch.