I mean multiple VPSs for redundancy. Contabo is maybe the cheapest I've seen and it's like 3$ mtl for the smallest?

You don't need multiple vps at all time and can start them dynamically using the vps provider api.

I regularly spawn temporary vps for a few hours to use as socks proxy and view sporting event from my country of origin. There is no reason one couldn't write a script that can spin a VPS choosing a provider and country randomly from a list of supported providers.

Sure, but ten servers is a bit too much redundancy, no? Depending on how many people you want to share it with it might make sense though.