Bitcoin GPU Farm Setup Guidance

I’m planning a small-scale mining farm focused on Bitcoin and I want to approach it with GPU miners. I’m aware this isn’t the classic ASIC route, yet I’d like to understand every angle before committing capital... (Budget: $30 - $250 AUD, Jobs: Bitcoin, Blockchain, Cryptocurrency, Data Analysis, Ethereum, Litecoin, Performance Tuning, Solana, Technical Documentation)