In my area, wax and method of application sets me apart from my competition.
Wax really looks good on vinyl, especially a bright yellow.
The xjet gives me a competitive advantage. The contractors around here are using ladders and long poles with towels on them. A house that takes them 8 hrs, I can do in 2 hrs tops. This allows me to charge less, but yet make more money per hour than they do. An average home, I can wash for $175, takes 2hrs from start to finish. My competitors charge approx. $225, takes them 8 hrs. In one day, I can wash 3 houses and make approx. $525 in 8hrs and my competitors can make $225 in 8hrs.
Good Marketing of your product + Quality Services + Quality Equipment + Quality Chemicals = Competitive Advantage.
Competitive Advantage = $$$$$
sorry, leave it to me to turn the topic of housewashing into marketing.