I was trying to show how it is important to know your costs in chemical usage. I'm not comparing pennies, the above is used by many large companies when employees are wasting chemicals, they need to keep track, even every penny counts. If you ever decide to have employees and grow your business, this will be very important. I choose to run my biz this way even if I'm not a large company.
I was not comparing perox to eg, only when Jon brought up the cost difference, I'm talking as far as dilution ratios you are spending a lot more product than one using less. Doesn't matter if you have to use spotters or not, not everyone has the same jobs. So some people may have high soiled jobs and others have light to medium soil almost every day. The difference would be on the type of jobs that you do, if you have to use a ton of spotters and trashed out carpets than go with one product that would eliminate having to use additional spotters, only common sense there and I agree. I only compared EG to Perox due to the price comment by Jon, however I no longer use EG I use SU and I have not needed to use any extra deodorizer such as odorcide ever since i made the switch, so that also saves me a ton of $.
Like Dus said, what I would also do is keep 1 gallon of perox in the van for jobs that have lots of urine stains, I don't come across these much. Most of the people that call are more concerned about the odor, so they end up going w/ pet odor removal.
Use what you think works best for you, not every job will need the higher dilution chemical(this has been my case).
I can use surround ultra or encap green on my jobs and not have a need for any other pre sprays, because my jobs are light to medium soil 95% of the time, so time spent is never an issue, and to me from what I mentioned above it's not a few dollars but $38 bucks.
We don't charge extra for cleaning or deodorizer, but I do tell them my cost is double for protector, that's the only add on I have for carpet cleaning.