How much SOL to run a validator?

I'm curious to know, could you please clarify how much SOL, or Solana's native cryptocurrency, is required to run a validator node on the Solana blockchain? As a potential validator, I'm interested in understanding the financial commitment necessary to maintain and operate such a node, ensuring the security and decentralization of the network. Additionally, I'd appreciate any insights into any potential returns or incentives for validators on the Solana blockchain.