For people having a low bandwidth at home and wanting to provide a VPS node I would recommend using Hetzner CX21 servers because they are affordable (€5.88/month) and they pass the resource proof challenges to connect a vault to the network.
I don’t have any link with them, it’s just my own experience:
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During my preliminary tests I used Vultur servers at $5/month because for the same price they are slightly more powerful than Digital Ocean ones. Initially I wanted a lower min section size like 5 or 7 and both Vultur and Digital Ocean servers passed the challenges successfully.
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But I came across some problems with these values with SAFE Browser and WHM and I was forced to use min section size = 8 to make them work. With this value, the $5/month servers from both Vultur and Digital Ocean don’t pass the test anymore for the ninth vault. The only one that worked was the CPU optimized server at $40/month from Digital Ocean. The configuration was then: 8 nodes at $5/month from Vultur + 1 node at $40/month from DO.
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Generalizing a $40/month was too expensive for me and I looked for other alternatives and I found that Hetzner CX21 server passes the test for the ninth vault. The configuration was then: 8 nodes at $5/month from Vultur + 1 node at €5.88/month from Hetzner.
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I generalized the Hetzner CX21 server because if a Vultur vault crashed, it wouldn’t be able to join the network again and so, my final configuration is 9 CX21 servers from Hetzner
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Additional advantages are: a bigger SSD disk (40GB) and a greater allowed outgoing traffic (40TB/month).
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The only drawback is that Hetzner has only 3 locations. So, if one of them is disrupted then the network might crash. But hey, this is only a test network.