Do you make more money if you have a more expensive PC as a node rather than a simple Raspberry Pi? How does your system hardware affect your lighting nodes income?
I dont think the hardware will effect it. Its relevant, that user use the route over your node.
Important is that your node is online 24/7
It's only relevant when you have thousand active channels or you also run your server/payment processor on PI's as well where your PI's isn't powerful enough.
BTC Balance on your channel is also important, otherwise you might not have enough BTC to route a transaction.
How does your btc balance affect routing? I cant understand. Do you need some btc to open channels?