What countries are you from originally? Plan a holiday to the US, look things over and then make a budget (emigration is far from cheap), save and then decide to back out or bite the bullet. Don't do anything permanent until your visa is in the bag for you, your spouse and your child. Hollywood and anecdotes are not good inputs to a life determining decision like this, consider it a huge project and devote resources…
Why is Belgium disappointing you? Well, given that his wife longs for "finally have some sunshine, lots of affordable fresh food, perhaps live in a house with garden, beautiful nature close enough to actually go camping for the weekends, and friendly and approachable people." I'm going to guess: high housing prices, population density killing nature & unfriendly people. Given that this is HN, I'd add "government and…
Yet they want to move to California.
http://www.hsh.com/finance/mortgage/salary-home-buying-25-ci...
I'm in the process of buying a house and am very glad I am not in California.