Check Out the "Paintrifuge"

[glatt]

Seems like a lot of trouble. Like classicman said, rollers are not that expensive. If I'm painting a room and might want to do another coat the next day, some saran wrap around the roller will keep it from drying out. Use it for a couple of days to finish the job, and then throw it away.

This invention is like inventing something that washes paper plates. It kind of misses the point.

But when it comes to brushes, paying for high quality brushes instead of disposable foam crap is worth it. I've got excellent brushes that are ten years old. Just keep cleaning them well and taking care of them.