It used to be that only the old orange RugDoctor machines were the only ones available to rent.
They were easy to use, bulletproof, but performance was so-so and it left a lot of water in the carpet.
https://www.youtube.com/watch?v=LyZPHf2UzzU
Bissell bought out RugDoctor in 2022 i think:
https://www.law.com/corpcounsel/2022/10/13/rug-doctor-legal-chiefs-role-eliminated-after-companys-sale/?slreturn=2024100695819
I bought a Bissell big green model a while ago. It was ~$380 then IIRC.
Does a decent job with minimal water.
Downside:The thin plastic feels like something might break if handled rough. The seals are thin delicate and there are 7 of them to leak. Water reservoir is small and waste side difficult to empty. The wand brush is air driven and clogs up easily. It's longer and more difficult to maneuver.