It doesn’t seem crazy to me. I just think you could probably do it with half that money, but it depends on what you want to do. Most costs are with flights, hotel, food, souvenirs and excursions. With flights, make sure you go at off-peak times and try to leave/return on Wednesday’s, never Fri-Sun. Use points as much as possible. I find Airbnb a much better deal than hotel rooms most of the time. Cook for yourselves most of the time. With 2 young kids, maybe forgo expensive excursions for parks, walking, natural beauty and other low cost stuff until the kids can remember it. Invest in getting a babysitter one or 2 days so you guys can explore on your own. Don’t buy any souvenirs or any stuff, it’s useless and meaningless. Take pictures and get them framed, that’ll last forever. Try to travel as lightly as possible. Good luck.