General

Are there any limitations or restrictions on running multiple nodes or devices from the same IP address?

There is no limit to the number of nodes you can run on the same network. However, it is important to note that when multiple nodes are active, they may sync at a slower rate due to them all accessing a single sequencer.

How much electricity and data does the node consume?

It depends on your country but It consumes a low amount of electricity, ranging from around 1.5 to 3.5 watts under normal usage conditions.

Should the node be running 24/7 or only when using the network?

When you disconnect it, it will not sync so you need to sync before use in the live network, but you can disconnect and continue to sync where you stopped before you reconnect it.

At what stage of the setup do I become a live full node?

From the moment you are syncing, you become a Starknet full node. In other words, you do not need to be fully syncing to be a Starknet full node.