[unknownkadath]

This seems like the kind of thing a father might impose on a teenage child and have backfire hugely, not that this is your situation! Not to mention malicious pranks...

However, if it's just for you, maybe you could make the smart home keee $CONDITION until a particular smart contract on the Etherium blockchain changes state, and have the contract keep some money in escrow until one month has elapsed, at which time it is sent back to your wallet. If you cancel early, then the money goes into, say, the pi-hole donation address.