This is a great resource. I'd nitpick that the childcare expense is IMO a terrible evolution of society. People used to take care of eachother's kids while they were at work (eg, work less hours or compressed days and trade day care days with a friend. ). It's far better for children to have stable adult support (ie same small set of people stably over time) than a revolving door of new employees, whomever is working that shift etc. So we're being less resourceful _and_ giving a worse setup to the next generation.