There are pretty reasonable 4-port KVM switches on Aliexpress that support 60Hz 4K and USB-3 for $55 or even less.
I got this https://www.aliexpress.com/item/1005002941646654.html a year ago. It has some minor compatibility problems with my Macbook Pro (or Apples' multiport adapter) which require me to remove and reinsert the USB-C cable from the Macbook once in a while, but it otherwise works very well.
A year later, there are multiple such devices starting from $30, or even less.
I got this https://www.aliexpress.com/item/1005002941646654.html a year ago. It has some minor compatibility problems with my Macbook Pro (or Apples' multiport adapter) which require me to remove and reinsert the USB-C cable from the Macbook once in a while, but it otherwise works very well.
A year later, there are multiple such devices starting from $30, or even less.