Hi forty. I used to live in Dubai, but then moved to HK. Here's my perspective, FWIW,
Re the maid/helper quarters, a lot of older villas are built so that there are separate staff quarters with its own entrance. Most apartments are now built with the maids room/ bathroom built into the apartment. If you want a maid who doesn't live with you you need to use an agency. Otherwise its illegal (or at least it was). Having live-in employees is a very hard line to tread.
Obviously you need to treat your helper well, but at the same time she's not your friend, she's an employee. Many of them are also keen to keep this distance from you. My helper has been with me for 6 years (3 renewals) and still calls me "ma'am" (her choice). She prefers to cook and eat alone or with the other helpers in our block. She has her own TV and uses our wireless and spends the evenings chatting to friends on Skype / FB etc in her room or goes for walks with friends/her sister. We make small talk and share jokes/ raised eyebrows about stuff the DC do, but not about personal stuff. You have to maintain some sort of distance or it would be too claustrophobic- remember she's basically a witness to your whole life- she hears you yell at the kids and crying with post-natal exhaustion. And yes, they do stuff that's wrong, and you have to tell them (e.g. I asked you not to let X ride his bike without a helmet. Please can you make sure he does in future). I guess it's like my boss- I like her, but I don't want to hunker down on the sofa with her every night, doing our nails when she has to also do my appraisal.
Employing a maid/ helper can be a win/win because you can be one of the good ones, in a situation where a job like that is their best financial option. But, don't start out on a wmc saviour mission. They just want a job where they get paid as agreed, get to go home, get their days off and decent conditions (i,e privacy and respect). Things like bonuses/ b'day gifts etc are nice touches. Once you start with the "You know, Marites, I really want us to be friends" they'll either (1) feel embarrassed because they don't know how to relate to you on that level or (2) you'll be coughing up funeral expenses for random family members once a week for the next 2 years. You can start doing more for them as you build the trust (I've guaranteed a couple of loans for my helper or given her advances to buy land and farm machinery in the Philippines). We also helped her sister get a visa. Some ask to borrow money a lot, and you're not always helping them by saying yes, as they then get perceived as the family ATM, getting a lot of pressure from relatives back home to ask you for more and then owing almost their whole salary in repayments. They'd almost be relieved for you to say no. It's the same with going home- some employers offer 3 trips home a year and are confused when the helper says "no thanks" but it's because they are expected to dish out cash and presents when they go home and often they'd rather you just gave them the money.
You can also get yourself in a situation where there's such a culture of mc guilt that they can do anything and you won't sack them because you get into a "they don't get paid much" and "I'm rich and they're poor" mindset. I know people who know their helper skims the housekeeping every week and don't say anything, whereas i couldn't live with that.
The queue thing- at the airport, they will often bring families or women with small children to the front of the immigration queues if they're long (quite sensible really), and occasionally in the bank they opened a "ladies queue", but I've never been called forward in front of other women of a different race, IYSWIM.
Anyway, not trying to sway you one way or the other. Just my perspective.