A gas-powered water pump would be safer, plus it would likely come with a
long output hose, rather than a cannister, which means that you do not end
up being the manual half of a electric pump.

Wet-dry vacs make a whole lot more sense than "steam cleaners" for consumer
use, though. Boil five gallons on the stove, slop it on the carpet, and suck
it up with a JobMate. Three times the capacity, plus the capability of using
water that steams. It is still not steam cleaning, and it costs a lot less.
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http://ecn.ab.ca/~brewhaha/