So the copart prius is disgusting as you may know. I was debating detailing it myself and waiting for a bissell or rugdoctor machine to come up on local classifieds, but none were really available for less than $80. I had a shopvac and had read about some people using them for extraction, but there were no videos.

Thanks to Happy Tree, there is an attachment you can use on your shopvac and extract water from upholstery. As you can see in the video, it works really great, and the part is only $43. They've provided me a 20% off code for viewers as well valid until 02/29/2020. Turn the shopvac you already have into an extractor for less than the cost of a consumer grade extractor tool. Your shopvac likely has much more power to extract water as well.

Tools from the video:

Happy Tree Extractor Tool Set:
https://www.amazon.com/gp/product/B07...
20% OFF CODE: UFTDZEA7

Happy Tree Extractor Head Only:
https://www.amazon.com/dp/B01N56WZ7D/...
20% OFF CODE: UFTDZEA7

Drill Brush:
https://www.amazon.com/gp/product/B07...

Scunci Steamer is no longer made, but it's called the SS1000. Check FB Marketplace or craigslist for steamers, they are generally available and cheap.