I'm not going to go out there and do extensive business research
I didn't ask you to do any research. You said "I'd legitimately would pay for it." and I asked one simple question: how much?
The economic viability I leave to anyone that wants to take it on.
This attitude right here is why the Fediverse is bound to stay small and amateurish. Everyone is just focused on keeping their own little pipe dreams and wishing that someone else to take on the sacrifice to do these gigantic efforts without expecting any reward.
No, I will look at kebab shops in your area and see how much they are charging, and I will check if their operation is actually profitable (instead of being a front for someone who needs to launder money) and I will see if they have enough customers paying the asking price. If the math checks out and if I see an opportunity for the market, then I'd go invest time and resources to open a shop there.
There is no such thing for "hosting providers that have been audited and can certify that the data is secured and properly managed". And given you are the first person saying "I'd pay for that", why do you think is somehow offensive to be asked "How much?"
Yeah, part of the research is exactly going to potential customers and asking how much are you willing to pay for this?.
Seriously, I do not get what is so weird about asking it.