Measure the distance from your Router to your Office, Nunua Ethernet cable, RJ-45, Crimping tool na Router. Lay the cable from your house to the office and connect the new router.
The route the cable will have to take might end up being about 200 meters and there is also the challenge of stringing the cable across the road from.my house.
If I can get a good wireless solution it would be ideal.
If I were a conman on Luthuli I’d sell you one of these and two days later refuse to give a refund once you understood the limitations of extending wifi.