The ultimate DIY server solution: slap a threatening note on a laptop and call it enterprise-grade infrastructure. That poor laptop has been conscripted into 24/7 service against its will, now living in perpetual fear someone might actually try to use it as... a laptop.
This is the tech equivalent of putting a "BEWARE OF DOG" sign on a fence when you actually own a hamster. Welcome to homelab economics: where repurposing old hardware as servers saves you money but costs your family their sanity when everything crashes because someone closed the sacred lid.