Her current rate is $2.2K for 28 days. Yes, it's a common practice to give ang bao upon arrival and departure respectively. We also pay for her taxifare when she arrives.
Upon confirmation of engaging her, you would meet up with her to pay her a deposit of $300.
Like what globetrekker said, no need to chop passport every 2wks, so no hassle.
She is with us 24/7 =), but she did go to the market/supermarket with my hubby to help with the marketing.