Worth upgrading my Internet Setup

[Strider123abx]

Hello toms hardware I was just wondering as I live in quite a large house and my Router is in one end of the house and my gaming desktop is at the other end. I have decreased the range by a third so far by attaching a extender to a room about 5 metres closer and hooking it up to my desktop through the roof using an ethernet cord however I am still 20 or so metres away. i am currently getting a stable ping in games of around 80-100 and i was wondering if putting an extender approximately 5 metres away from the router would help. if it will reduce ping by 20-30 ms I would be happy to do it but any less I will just leave it alone. if you guys have any other suggestions to reduce latency that would be great
Here is the link to the image of the setup
https://1drv.ms/u/s!Agw54YiBpjKegoE0WD5Df6D6RsGtsw

 

[kanewolf]

If it was me, I would get an ethernet cable to the PC. Either on the outside of the house (painted to match) or in the attic/basement. You can pay a professional low-voltage cable installer. They have specialized tools to get cables almost anywhere.