Officials to offer 50% subsidy up to $310,000 in effort to make one of world’s most expensive cities more affordable Officials to offer 50% subsidy up to $310,000 in effort to make one of world’s most expensive cities more affordable San Francisco will offer free childcare to families earning less than $230,000 a year, and a 50% subsidy to those earning up to $310,000, in an expansion of the city’s childcare offerings designed to make one of the world’s most expensive cities more affordable for