That’s a good question. I mean why not just go to your local Bunnings Nerang and hire a carpet cleaning machine for the day? Then spend the day learning how to become a carpet cleaning professional and cleaning your carpets. That could be fun if you are into that kind of thing and want to save a few dollars. For a 24 hour hire and basic shampoo to clean 3 bedrooms of carpet would set you back about $75 + an extra $25 for any deodorisers / stain removers.