Max out every cm^2 of your roof with solar panels. Get a house battery. Get some ASICs in an immersion cooling tank as a heat reservoir. Start with old hardware to reduce upfront capex. Use heat exchangers and/or radiators as modular heating solutions for your HVAC, water heater, hot tub, under floor heating, greenhouse cannabis farm, cocoa factory, maple syrup processing, or whatever else you can think up.

Alternatively, you can start cheap by installing ASICs directly in the air return of your HVAC like in this pic from Anadro: