You can consider to buy short term insurance.
For short term local maids and short term insurance, you can check with 家務通.
I employ part ttime maids through them and so far most of them are good.
For your info, hour rate in HK side seems more expensive $55-60/hour, depends on your frequency of work.
wp-bn,
You can call 家務通 and try to tell them your requirements and offer and see whether they can help you to find one local helper.
You can then raise your salary offer if there's no reply for weeks.