How to get a good maid

I am looking for a part time maid for general housework, cleaning, ironing, some cooking. House is 3 bedroom but i am mostly going to be living alone. Family may drop in for short holidays but usually only one member at a time. No kids, no pets. Area sukhumvit. Easy to get? How much to pay? Are there work permits one needs to verify? Selection criteria that has worked for other expats.... any suggestions welcome.

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