Yuen Long is a great place to live - very vibrant and with a reasonably large South Asian community too from what I have seen. If you like outdoors, plenty of hiking and beaches in HK for entertainment when not working for free. You can certainly make that work if you are willing to compromise on space and location for your career and with a wife as a banker she should find work when ready. Best of luck. Note that HK is also pretty racist, so brace yourself for that.