Like I said good luck to you if you are achieving those prices, I suppose it boils down to how busy you want to be or how many jobs a week you are doing. I base my cost for commercial on several factors, a big one is frequency of clean. I like the fact that I can predict my work due to the number of cleans I do, for instance I have some offices I do 6 hours a month at £352 per month fixed cost, add to this office chairs at £5 per chair (prob do 30 a month) and then the dinning chairs at £3.00 each 3 times a year and I am happy at this.
Your marketing and sales must be well targeted to reach customers who are prepared to pay.
John