I asked a friend of mine who is high up at a coding bootcamp. He said it's not uncommon for people around 40 to go through the program and they've had success,

I asked a friend of mine who is high up at a coding bootcamp. He said it's not uncommon for people around 40 to go through the program and they've had success, but 25-35 has more numbers and more success. But that certainly doesn't rule out the older folks if they put in the work! Places like that tend to advertise >90% job placement and starting salaries in the $60k-$70k range depending on what market you're in, which seems like great odds to make a good living.