It's not a steam cleaner, but my Hoover Floormate works like magic on my vinyl floor. I got mine on Amazon, reconditioned so it was cheap compared to a new model.

I HAD a carpet steamer, but that took so long to clean one carpet, I'd recommend a professional to do it, or rent one of the big steam cleaners and do them yourself. The models at the store they have available do about a 3x3ft square and you have to change the water.... what a pain!!!