Realisitcally I think TO is a better choice vs HK if you really have to go to the route of hiring someone outside of ottawa, TO is about $1300+/month + travel fees to Ottawa and accomodations, there're agencies there that can help you locate one helper.
The airfare someone needs to pay for a HK nannay will already be $1600 or more, ! $20HKD/month = approx. $3000CAD, + airfair =$....
it is not worth it for just one month regardless of the budget!
Ottawa's market is very limited, thus is not as expensive, but it is so much harder to find someone...anyhow it's a matter of price you're willing to pay, but since your parents are coming, and if you really can't find anyone, then you just have to prepare until they come la...
Pre-cook lots of food and soups and freeze them, get your LG to do the laundry, house work and diaper change and bath the baby, all you need to think of is baby's feeding, sleep, and eat!