I have a Tornador Z-020 Black I bought off eBay 3 or 4 years ago.
You need a compressor but it does a great job at cleaning interiors that are in an awful mess without leaving a lot of wet residue.
I can't remember what I paid for it and you'd have to offset it with the cost of hiring something to see if it's worthwhile.
I've only used it the once as I've never had anything that dirty since that couldn't be cleaned with products like the Bowden stuff linked above.
https://tornador.us/video-demos.html
https://www.ebay.com.au/sch/i.html?_nkw=tornador
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