A few questions regarding rbuilder

I am a beginner looking to participate in the builder process, and I have a couple of questions:

Hardware Requirements: What kind of hardware specifications are required to run rbuilder on Mainnet currently?

Custom Logic: Is it possible to customize the fees paid to validators? Specifically, does rbuilder support custom strategy functions to determine these payments

The issue names no file, test, or entry point. Start with rbuilder's documentation and Mainnet setup guidance, then check the documented strategy or configuration interfaces for the validator-fee question; done means providing clear answers about hardware requirements and custom payment strategies.

Written by the indexing model from the issue text.