Sid Singh, 36, was joking recently with a friend that everyone he knew seemed to be having their third baby while he was bringing something entirely different into the world. He had just quit his consulting job to build a financial coaching company. It dawned on him that he could have a baby shower for his new endeavor.“It’s a big shift for someone in their 30s to quit their job and restart their life,” said Mr. Singh, who lives in Brooklyn. “It’s probably one of the most momentous things you can do.”In November, long before he had …
