I haven’t had the time to look deeper into this but how does that affect anything if you self host or simply choose a different server? The way I understand it, that’s exactly what they’re pushing for here. How is that “federated platforms”?

The 8 hours a day is what makes your situation challenging, more than the 7kH/s. Controversial as it may sound, I would consider mining on the largest pool I could find, the one that finds the most blocks per day, giving your 8 hours a better chance at getting paid. I haven’t checked the numbers mind you, so DYOR.