How much to pay for a driver in HK? Filipina drivers are more affordable? Are they reliable?

I will be moving to HK soon. My husband wants to buy a car but only wants to drive it during the weekends. So is there anyone out there who knows how much does it cost to hire a driver in HK. And we also heard that you can hire Filipina one for an affordable rate. Are they reliable? What kind of visas do they have in HK? Are they legal and if so how do we get about to hire them. Thanks. SE