Halafax

Pretty much this. There is a significant learning curve to kubernetes (or similar, I guess?), but it’s a handy skill to be familiar with. If things basically run but with degraded performance on one raspberry, there is no real need for a vertical performance increase. Adding the second will provide almost double capacity, with some HA added for fun.

If containerized, scale horizontal and load balance.

If you read the articles you linked, you’ll notice some specifically fishy language. Neither one says that donors are promised first dibs, only that they often get it. If it’s not written down, you have nothing if they decide to do it differently.

Source? When they proposed to do this for blood donors, it got shut down in a hurry.