Wifi repeaters/extenders can create some network issues, you'd be better off getting an access point like the one recommended by Upscale Audio for their streamers which require an ethernet connection like Lumins. From their site:
Add quality Wi-Fi to any Lumin with this product from Amazon. In-store tested and capable of handling even DSD 512 flawlessly! TP-Link Wireless N300 2T2R Access Point on Amazon
Powerline adapters can work, but go against the audiophile objective of limiting high frequency noise in your power. As such you may make the network connection but they can compromise the sound quality of your audio components from the added powerline noise.