You don't have to buy a new computer to get Wi-Fi 7 speeds. There are external Wi-Fi dongles, such as the Asus RT-BE58 Go or Acer Wave D7, that you can plug into an available USB port to get Wi-Fi 7 ...
If you're running your own VPN server, you're not limited to whatever a commercial VPN provider allows, but that doesn't mean you're immune to speed issues. You also have to worry about speeds back ...