The issue is that she's super incredibly unhappy. Like mega unhappy, living in England, raising our daughter without family living literally next door. Her ideal would be able to just drive to family in the afternoons to spend some time with them while I'm working. That's her ideal.
Why is she unhappy? Do you think she'll be happy in the US? Unless she's unhappy because of your meagre £200,000 odd income? I can promise you, the extra money isn't going to help in that department. Putting your materialistic desires before your wife's happiness is only going to end one way.
She is also upset that we haven't made a final decision on where to live. I haven't made this final decision because I don't know what to do.
You two need to make that decision together. And if it's a compromise, you need to have a clear understanding of what each of you are willing to give up and compromise on, and how you're going to fill those gaps. So back to my earlier comment, you need to understand why she's unhappy. "I think what's driving this" isn't any good. You need to be able to articulate the problem in a way that she agrees with. And make sure whatever you propose, addresses this in a way that you both agree is worthwhile. You're practically in still in the honeymoon phase of your relationship - it's not going to last forever. Unhappy wife, unhappy life.
Quick summary of options and then I'll stop writing:
Option A): Move to the USA. Great climate, double the income, retire early, big house, holidays all over the world, full time nanny. Would likely include investing in property in Poland and spending a few weeks there every year. Easy to do when earning dollars.
Option B): Move to Poland. Climate about the same, if not worse than England. Income takes a hit, but cost of living drops too. Probably a full time nanny, big house. Family nearby and not too far to my own European family. But we might have to live close to Warsaw so still 1-2 hours from her family meaning she can't just drop in every afternoon.
Option C): Stay in England. Climate sucks, natural beauty sucks, overcrowded. Income remains good, with a higher ceiling. Can't afford a full time nanny right now but she doesn't have to work either. Could buy a holiday home in Poland and spend a few weeks there over the summer, and have her family stay with us instead of the other way around.
A few thoughts:
1. You don't have to make a decision now that's set in stone forever. Things change, and if you're in engineering, you'll always have options. If being close to her family is really important, while the kid is young, and particularly if there are unresolved issues with the family that will require face to face time, then this is what I propose: Agree to give Poland a try for 5 or 6 years. Pick a city close enough to her family so it's a reasonable drive/train ride away. Lots of British and American companies have operations or contracts all over Eastern Europe where you'll be able to work in English. A gree on what you two want to get out of the time there. Relationship goals with the family, etc. Your reasons for being there. Then, when the time is up, you can decide to stay if it worked out or decide where you want to go next. Five years from now, the world will probably look a bit different.
2. Learn the language. You're married to a pole. And make sure your kid learns the language too. I know the slavic languages are hard, but if even the dumbest Polish idiot could learn it, so can you.
3. It really sounds to me like US is your obsession and it doesn't really have much to do with your wife. This seems a bit selfish. But if you wife is mega unhappy in the UK and wants to be in Poland but somehow is OK with the US, you should seriously consider a few other places. Australia has all the good parts of the US minus all the awful stuff. Much better working culture and work life balance too. Lots of British and Polish and South African immigrants - you'll be able to find likeminded people easily. This
thread should give you some ideas.