But if you actually want your Ethernet to be similar speed to your SSD, you don't need to spend that much. Get some used gear.
32 port 40GbE switch (Dell S6000) $210 used
Dual port 40GbE NIC (Mellanox MCX354A-FCCT) $31 used
40GbE DAC 1 meter new price $22
or 40GbE optics from FS.com (QSFP-SR4-40G) $43 new + MMF fiber cable
Of course, that's probably not going to be very power efficient for home use - 32 port switch and probably only connecting a handful of devices at most.
But if you actually want your Ethernet to be similar speed to your SSD, you don't need to spend that much. Get some used gear.
32 port 40GbE switch (Dell S6000) $210 used
Dual port 40GbE NIC (Mellanox MCX354A-FCCT) $31 used
40GbE DAC 1 meter new price $22 or 40GbE optics from FS.com (QSFP-SR4-40G) $43 new + MMF fiber cable
Of course, that's probably not going to be very power efficient for home use - 32 port switch and probably only connecting a handful of devices at most.