100% every American street address should be a node.
If you're on the grid; you should be hashing.
"be hashing"? You mean mining?
You don't mine bitcoin by just running a full node. For mining you are going to need specialized hardware called ASIC which you need to purchase and use up electricity to run so that you have a decent enough hashrate to mine bitcoin.
No, I mean supporting the network by contributing to validations.
Not mining. This just opens the door to mining.
Again, I'm new here so if I seem confused, not all who wander.