Yep this ^ The OP's problem is one of the main reasons I don't get why people move 100s and 100s of miles away from family and friends. Maybe it's just my upbringing and background, but where I come from, communities are close, and families help each other, and although people travel and move away for a while, most people do return and come live closeby again.
I think it's fine to live in different places, different towns and cities, and different countries, and to travel the world, and maybe even live abroad for several years, maybe up to 7 to 10 years even.
However, completely moving away from everything you know ... your family, (close family, and extended family,) and friends, permanently, is a different matter in my opinion.
I think once you've had children you really do need support of friends and family. If you're hundreds of miles away where you don't know anybody, you are definitely going to have an issue when it comes to help with childcare. The most obvious answer @sickbabyagain is that one of you to give up work, because as you say the vast majority of employers are not going to like it when their employees are having a lot of time off. Even if there are valid reasons.
Indeed I do actually know a number of women in the recent and not so recent past who've actually had employers (and their fellow employees) say 'why are you even working if you can't do the job properly, you should really just leave and be a full time parent - it's not fair on the rest of us to carry you!'
Sadly, I have no answers, except as a few others have said, get better/different childcare, or one of you gives up work.