Congrats on the new addition when you get her And welcome!

Just wondering if the thermometer and hygrometer you are talking about are digital? Digital monitoring is the only way to go when keeping this species since they require very stable temperatures day and night. The analog dial-type will not give you this accurate measuring. I don't know if you have WalMarts up there, but a good unit can be bought from there that measures both temp and humidity for around $15US. Try chain hardware/building stores, and if you have a RadioShack, those may have it too. The Brand is Acu-Rite(don't know if they have that brand there either, LoL)

One suggestion I would make is to use newspaper or papertowels for the first few months so you can monitor the consistency of the feces and make sure they are normal. Even though the pet store seems like a good place to buy a snake, I would get a fecal done on the snake to make sure it is completely healthy. Any veterinarian will be able to perform one and it shouldn't cost much at all. Whenever you get the snake, and after it passes feces the first time, take a small sample about a teaspoon, or the size or your fingernail, place it in a plastic storage baggie, and put it in the fridge until you can get it to the vet.

Also, what type of heating are you planning on using? Undertank heating with a heating pad or flexxwatt attached to a thermostat will be your best bet when keeping these snakes and any snake. Any kind of heat lamp is going to dry out the air and the snake won't be able to shed properly. Temps should be maintained year-round 24/7 at 82-84 on the cool side and 92-94 on the warm side. Humidity can be around 45-60%. Just make sure the substrate isn't retaining moisture though, as it can lead to scale rot and blister disease.

Ok! I'll quit babbling now. Hopefully some others from Canada can help you out with that price and whatnot. Good luck with everything