I own a daycare and over the years had 6 different companies come out to clean the carpets. Either they don't have the right machines or have no clue how to clean the carpets but these carpets look dirty all the time. They are only 6 years old and were a good brand. Last year I rented a 100psi extractor with heat and I did it myself and it came out better than the professionals. Now to my question. What portable machine or machines and chemicals should I use to clean 8 rooms with 500 square of commercial carpet low nap on concrete and some have a pad underneath?