Hello and welcome!
Your internet connection doesn’t need to be top notch for Storj, but it should at least support a 5mbps upload throughput.
Then, using a RPi (preferably 4B, but it works on RPis 3 too) is usually a good option as it’s very power efficient.
Setting a raid is generally not recommended as it’s more profitable to run one node per disk. Also this way if a disk fail, you wouldn’t lose your whole and only node, you would only lose the node attached to the failing disk.
(some may disagree - it is what StorjLabs recommend though ^^)
To clarify some terms you used:
- Egress: data coming out of a node, also known as “download” from customers point of view.
- Ingress: data going to a node, also known as “upload” from customers point of view.
- Audits: very small requests made by sattelites to check a node is still actually storing the files it is supposed to. There is not really notion of “bandwidth” linked to audits as they are very light to a node’s connection.
Here is a google sheet you might want to copy to your own account to fill in your numbers: it estimates what behavior to expect with regards to egress/ingress with time. Check it out: