Soldato
Web design is pretty lucrative if you have the skills. That's the point isn't it, web design is a high skill job. While computer repair does take some skill, it's a common hobby and it's easy to DIY fix a home computer. (Businesses are different though, businesses with complex networks that need to be set up and "repaired" can be decent money), but I don't know if I said this already (I've got a paralell discussion about this on a business forum), to get access to computer/network repair for businesses you need to have skills and certification.
With the tools available these days I dont really think web design is any harder than computer repair really.
As has been said there is money in second hand games, if they were to focus on that then his business could work, whether or not they would need the overheads of a shop is another matter, I would personally build it up as a mail order business first and then when stock and business dictated maybe look at opening a shop.