.........a couple of comments/suggestions.
Good maids are hard to find.
Honesty is a weird commodity - just don't give any opportunity for theft
If the work is light, the maid will be lazy and watch television in her room at every opportunity. The cushier the job, surprisingly, the more likely she will be to leave
This is so so important. Your wife needs to take the maid on day one and clean with her to show the standards that are expected and acceptable. Supervise this! No - you and your wife are just nodding assent - you don't yet believe me. Do exactly as I say. Exactly! Thank me later.
You may be asking the impossible - a live-in maid without a husband and family or one without a boyfriend.