Usually, I’d aim for the cloud environments for public resources (serving more than like 20 people), as the traffic won’t be hitting your home network.
Additionally, selfhosting a public service like Lemmy on your home environment probably wouldn’t have the same uptime or reliability, as I only have one strong ISP signal, and no backup generator.
However, pricing wise, selfhosting at home is much cheaper for the processing power you get.
For backup power, you got like a generator for the server, or the whole building?
Whole-house generator. Nat gas fueled 22kw. My server rack has enough battery power to allow the generator to kick in (auto transfer switch).
It wasn’t a choice purely for the servers though. I work 100% from home and my wife about 25% and we don’t have overly reliable power so it had a lot to do with that too. I can operate just like normal even during an extended power outage.