I live in a MIL suite in the house I live currently. Trying to improve my wifi

Go outside and touch some grass

<$100 used marketplace / CL / eBay:

Deco x55 - if wired
Deco x60 - if not wired

Check if back house has a phone line or coax jack. Maybe you’re lucky and phone is homerunned cat5 that can be easily spliced over to a router. Can use MoCA over coax same way. My living room node is wired from an old cat5 phone line. Works perfect.

Wavlink access points are $200 and less and will blast WiFi over a large acreage. I installed one outside the main house, and it feeds WiFi to a trailer home about 100 yards away. There are several YouTube videos of folks demonstrating the signal they get on their farms and put buildings.

I just did this to a Shop / MIL suite. Its about 90 feet away from the big house. I used this to beam the Wifi over there and then just plugged in a mesh puck to send wifi out into the building

Pretty Much plug and play

LINK