@easystreamer Reducing your transmit power so you limit your Wifi to only your home/property is solid security advice, and it makes you a good neighbor. Unfortunately it doesn't reduce your neighbor's transmit power so AFAIK you will see the same amount of channel congestion.
Implied in your approach is the use of a Wifi analyzer for your laptop or phone, which is also solid advice. Knowing your signal strength and what channels are free is a great way to maximize your throughput.

