Oh, wow. Nice specs.
Please run everything I just listed on each, and give freenet a few terabytes. You can also run a full Bitcoin node on each.
After that, you'll have enough processing power left over to host some VPNs, which you can charge for.
ok, how would i go about doing that? i normally pay people to do this kinda shit for me ;-)
Freenet and i2p installers are .jar, straightforward installation. Reference:
During Freenet setup you can choose the amount of space. "As much as possible" is appreciated.