Can you simply bump the strength of your current router? I found an option "TX power adjustment" on my Asus Router.
The limitations aren't usually the transmit power of the access point. The limitation is usually the ability to clearly receive the signal from your device, which is much weaker than the transmit from the access point. Unless two-way communication is established, it doesn't work.
Windows can block/decrease wifi strength https://blog.plumewifi.com/five-things-in-your-home-that-are-killing-your-wifi-35a5cd296e7
Well these aren't low e, just regular old double pane, one's 20 years old and the other's maybe 50. I just ordered that unit, supposed to be good to 600 ft. so should be a huge improvement. I still think we should update the router but I'm only fucking with one piece of electronics at a time.
Get a Google WiFi 3-pack. Connect one to your modem, one near the front of the garage, and one in the house.
I chose to keep it simple. One big router with signal strong enough to get WiFi wherever I needed. I got the Asus RT-AC5300. Range is strong, with signal throughout all three levels of my house, in the driveway and down the street. Great interface, and easy to setup. Best-Buy and Amazon just dropped the price on them too.
Several of the techie nerds on here have recommended Ubiquiti over the years. They make a great line of prosumer products. The Ubiquiti AC Pro is a great access point. I have two of them in my house and there isn’t a dead spot to be found. The key to setting those up is the direction of the antenna. The RF energy emits from them like a sprinkler head so placement is paramount. While they are Omni directional, there is an aspect of unidirectionality to them. However, I don’t think it will get you the coverage from your garage across the street. This thread explains placement a bit more and includes a visual depiction of the energy spread. https://community.ubnt.com/t5/UniFi-Wireless/Unify-AP-LR-Best-Orientation/td-p/1262244
I borrowed my nephews wireless router but it did't have enough power, so I went back and borrowed his corded router. I was using a rounding bit on a cabinet door.