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I solo mine to my own node and local instance of public_pool.io running on my Umbrel Home.

With your electricity rate you could dip a toe into the real thing by going with something like the Canaan Avalon Q. Good price point that isn't too loud, produce too much heat and generates a decent amount of hashrate relatively efficiently.

https://www.solosatoshi.com/product/canaan-avalon-q-90th-bitcoin-home-miner/