Do you own a carpet cleaner?

I'm debating if I should buy one on Black Friday (or ask for it for xmas), Kohls has a Hoover Powerscrub for $110, or just rent. I can rent one from our local hardware store for $23 for one night.

I'm leaning towards rent, because I figure I'll use it probably twice a year (to do the whole house) and I've read they can rust out so not sure how long they last?

*I could also use this to spot -clean way more than twice a year though.. kids!