M.H.
Hi Josie,
With the economy the way it is I've seen whole house (approx 5 rooms) steam cleaning for around $100.00. I'd call around to the professionals in your area and see if anyone is running a special or look in the "thrifty nickle" type papers or on craigslist. Steam extraction is really the best way to get them clean and if you try to do it yourself you will probably spend that much money anyway....
M.