TV mounting in Brampton is mostly newer houses with tall main floors. Springdale, Fletcher's Meadow and Mount Pleasant were built with nine foot ceilings and a fireplace niche that sits high, so bracket choice and screen height matter more than the drilling does.
I set the TV where it is comfortable from the couch, not where the niche happens to be. Cables run inside the wall when there is a path for them. If you have screens waiting for the basement and the bedrooms too, list them all and I will quote the lot as one visit.