“My mind doesn’t stop thinking,” the 29-year-old model and real estate entrepreneur Jodie Fanelli said last month, driving in her Porsche SUV to Bensonhurst. “I could wake up in the middle of the night and I come up with crazy things that I’m, like, I have to write it down right away, and I want to try and pursue it.”

“The first business we were ever in together,” her identical twin, Diane, said, “we sold…