Back when I first discovered my neck issues, I was looking at a lot of business ideas... some online.
I found a couple who taught the computer cleaning service... and the fee, then, ranged from $15-$35 per is memory serves.
The cool thing as, according to what I read, how many need/enjoy the service. But I also read good things about the Vento from those who sold it.
someone use to have, as a signature: Never trust anyone with something to sell and it rings true today...but I digress.
The tools were: A good, small, high filtered vacuum...one like Jim used to and maybe still sells. Little cylinder thing. Cool. And the right brushes, screw drivers etc...and the book teaching how to do and how to sell.
I researched the idea for weeks...maybe even wrote something about it here.?
Onoe of the companies I researched also spoke of how, if several people use the same computer, how colds, viruses etc can be spread that way...so they came monthly, I think, to disenfect.