I have an 11, 13, and 15 year old. A few things to keep in mind:
- Infant, diaper, toddler phase feels like an eternity and lasted nearly a decade. It turns into a rote behavior, but still got old quickly.
- Vacations are significantly more expensive. You’ll eventually need a larger room / two rooms for hotels and cruises, and as mentioned above most packages come in 4s, nothing comes in 5s.
- Coordinating school, kids’ activities, homework, etc. is significantly more complicated with 3 than 2. My kids attend three different schools and also have soccer, dance, and gymnastics after school. It's a lot.
And I’d still do it again. Kids are amazing, house is full of love, they’re all best friends, they get along extremely well, and they take care of themselves.