I think the only household like item that would work for mining is if they put mining chips directly into solar cells and it is probably gonna be a small amount of mining chips per solar cell since solar generates so little power. The chips should be working 24/7 and housed waterproof somehow lol. Or better still, do wat tesla does and put solar cells into roofing with the chips. That might actually work, where the solar is located on the roof outside and generates electricity and the chips are located on the inside of the house and creates heat and btc. The good news is that it will never turn unprofitable haha.