What is everyone's thoughts on renting out personal GPU compute?

Been wondering about this for a bit, but not sure what the viability is for such a thing. We all have some amount of Nvidia gaming GPU's lying at home, which of course are used primarily for gaming. I was thinking of building something that rents out those GPU's and create a distributed marketplace of sorts where folks with GPU's could sell compute to those who need it. With a large enough network of users, it could become a distributed cloud where no single org owns the large swath of compute. It doesn't necessarily have to be on the blockchain. Where does everyone stand on this?