Amazon.ca has a WiFi Range Extender Signal Booster at $23.99 ( Was $36.83 ) after coupon code "LPHZ6JKP". Link:https://www.amazon.ca/dp/B01N0VHZ61/

The coupon code is the "promotional code" that amazon named. Just enter it at checkout.This extender will boost your wifi signal to 5 bars at any corner of your house. I belive the price is very nice. Be sure to check some customer reviews before you buying.