ad hoc

 While living with family, Gerrard survived on social security and sued the driver who killed Foster for $35,000, allowing the family of five to buy a space of their own. But it was the network of folk musicians — ad hoc babysitters, grief counselors, life advisers — that helped most.

ad hoc

/ad ˈhɒk/

adverb

1. when necessary or needed.

   "the group was constituted ad hoc"

adjective

1. created or done for a particular purpose as necessary.

   "the discussions were on an ad hoc basis"