I use the Bissell Quicksteamer. It fits the size of the rig and cost between $70 & $80 at Target. I don't remember exactly what I paid. Prior to the Quicksteamer I had a different Bissell carpet cleaning machine that was not as easy to use.
I steam clean my 5vr carpets once a year and now with the Quicksteamer a touch up in the "kitchen" area is easy as pie.
You can use it at home also. Such as when the husband spills a bottle of orange colored cough syrup in the hallway.