Regarding (2), how are you funding the initial phase of the project? After all, you're offering 30 GB of storage - twice Google.
I did not expect to reach Google's scale during the next month so currently we are bootstrapped and rely on some AWS credits :)
https://gizmodo.com/amazon-is-aggressively-pursuing-big-oil-...
In france you have OVH - the invest heavily in solar energy and build datacenters with low energy consumption in mind. That might be a better choice (not working for them).