It's totally by accident that I dropped by this website a week ago and your family's story attracted me immediately. Your experience is not very typical among the Chinese immigrants (at least the technical immigrants) but your attitudes toward life and work could be very well learned and emulated. Your sincerity is special among many Chinese businessmen as well. It will be very helpful to lead a comfortable life in North America, I believe.
I've been following your job hunting experience and was very much relieved to learn that you chose the financial?/accounting? company at last. I'm sure you will learn a lot of North American investment/business operations this way. Plus, an additional $50,000 investment doesn't make much sense to me at this stage. In this country, business connections are essential and the business circle is surprisingly small. Showcase your capability early on would make a lot of things easier.
It's enjoyable reading your daily life. You are so lucky to have a happy family, which is also expanding! Congratulations and good luck for everything ahead of you. Confident people deserve a good life...