You are indeed lucky to find a partner who fees the exact same way as you about saving and having kids. Is the 150k joint savings or your individual savings per year?
It’s a high number but if you take advantage of all the tax deferred accounts available and are an average performer at a good company, it’s incredibly easy in the bay to get a $250-300k job, at which point the $150k becomes very achievable if you live frugally (in my case it’s a bit less than $150k, but I also don’t think I’ll need 5M to retire, that’s way too much considering my life style and the fact that I’ll probably just go back to my home country in rural Europe to retire close to my family).