This topic is heavily explored on both audiophilestyle and whatsbestforum. There are ways to optimize what you have or with limited investment for good improvement. PM if you wish to discuss further but two links I found helpful are:
https://whatsbestforum.com/threads/network-improvements-and-their-impact-on-sound-quality.30455/page-22#post-657980
(22 pages of discussion)
And for Waversa:
https://whatsbestforum.com/threads/waversa-wcore-wrouter-streamer.28621/
(Two pages of discussion)
https://whatsbestforum.com/threads/network-improvements-and-their-impact-on-sound-quality.30455/page-22#post-657980
(22 pages of discussion)
And for Waversa:
https://whatsbestforum.com/threads/waversa-wcore-wrouter-streamer.28621/
(Two pages of discussion)