Unfortunately the "good feeling" do not pay the bills. 

The donation is a great idea, it's just the "proof of storage" part that would get tricky and to get people to appreciate the effort, of other doing it, for them.

But you could get a generated list on say "Blockchain" and people could be encouraged to participate, by having a monthly "Lottery" where a portion of the donations, goes towards a single pot, and you get people winning that "pot" each month.

Just a thought.