Hi,
Im english and lived in NL for 9 years. My wife is from Amsterdam even though we currently live in the east (which we are going to change).
Your child could go to an everyday school. You will find the dutch speak brilliant english at nearly all ages. Theyre probably the most tolerant nation there is too towards other cultures. When we moved here I was 33 and had a very stressful job that demanded a massive amount of time and yet I still elarnt to speak dutch fluently in 2 years, since then I have been improving the grammer and fine tuning expression.
Privates schools like anywhere will be super expensive. One thing to consider, Holland is very expensive. cars are nearly twice the price as in the UK and other costs would be about 30% more. beer and coffee however are not expensive. Tax levels are very high however there IS a possibility for expats to have the 30% rule. This reduces the tax level you pay by a lot however I do not know what conditions need to be met to get it these days. This runs for 10 years once you have it. Housing is way more expensive but a mortgage is more accessable than in the UK. standard of living is way better, its clean and everything works, even though it can be a little stiff with all the rules and social controls (as we call them - like your garden being tidy or dogs being on a lead EVERYWHERE, even in the woods).
Education standards are better too. Social and health aspects are better as well. Health is more like an american systems for me, its expensive (i think we pay about 150euro per adult per month) but this covers things like physiotherapy and rebates on reading glasses ect. This is a mid package. We are not covered for dental care for example. Also, if you were to work here and ever lose your job, the unemployment benefit (as we would call it) is enough to live on, usually being upto 75% of your income for the first 12months. I believe it declines after that by a bit but I am not sure.
Amsterdam will be extremely expensive!! Anywhere in the Randstad (the edge cities, which is basicaly anything between Rotterdam, Amsterdam and Utrecht will be more.
but its a great place. you get a lot more back for the money you put in, in the sense of living standard, cleanliness etc. Also, should either of you want to start your own business, competition here is not as aggressive as the uk. You can earn a very good living much more easily. In the uk, you basically cant compete, but here you can. Due to the hire prices of everything, people seem to be able to earn well even though they are not particularly special, intelligent or unique. I am not suggesting either of you are any of those things but the dutch seem to be prepared to pay out way more for things than we would consider there worth.
Salaries are also much higher here.
thats about all i can come up with for now, hope it helps.