I don't bother with IE6 any more. IMHO, nobody should still be using it.
Having said that, I do make simple changes if it will make it work, but I don't let IE6 dictate how to build the site.
I have built websites for two osteopaths and they both really just want an online brochure. Like your friend, they get most of their clients through word of mouth.
Windows 10 Home vs Windows 10 Pro comparison: Here are the extra features you get in the Pro version