I totally see what you are trying to do and think you are kind of right. Considering I have multiple win XP machines that I am still using today says alot.

On the other hand, hardware is cheap and think ChromeBooks (https://www.google.com/intl/en/chrome/devices/chromebooks.ht...) will solve this need

I would recommend giving it a try by showcasing 1 and saying it and if you sell one - tell them to come back tomorrow to pick it up and spend the evening making it work.