I am new to Time 100mbps with a huawei HG8145V5. Wanting to upgrade for better wireless connectivity around my house condo 1450 sq ft. Having a lot of dead spot at the back room where I have a lot of connection drops.

I am thinking of few options below :
1. Mesh wifi
2. Get a better wifi router
3. Get an access point poe - I do have a cat 6 cable running at the ceiling from The living until the back room corridor but I don’t have any power points next to it.

Any recommendations?