Do you have any idea how many nodes are currently running right now?
There are 58 mining nodes running at the moment out of the total 75 validated addresses:
https://scan.idena.io/#minersand what is the basic hardware requirement running the node?
I have a PC right now with 8 Gb ram and I am using this computer for 12 hours/day, I would like to run one of the nodes if it is possible using my personal computer.
That's fine for running the Idena node.
I have downloaded the wallet and running it on my computer.
this is not fine at all, my disk is running for 90%-95% when I am running the node. It makes my computer very slow, and hard to use.
I do not think it is possible to run the node on VPS too because my account will be suspended if I am running it on my VPS, it requires 90% of the disk to run the node.