Looking for change of career/new pie to get my fingers into - Pc/Mac repairs etcc

BigCraigJohn

I'm self employed running an online vinyl/cd site and doing a bit of sound engineering aswell as the odd bit of driving however neither of these pay all that well and the first is certainly a dying trade. I've been thinking of getting into something else with more of a future that would interest me, I'm pretty competent inside a pc or Mac and have a good understanding of windows and osx, I have fixed lots of friends/family computer issues but it wasn't till my dad mentioned that a bloke at work had paid £50 for something I sorted in 50 mins, I figure that 90% of problems are something simple.
Just wondered if anyone had any idea what sort of training/qualifications I might need to get Into something like this?, I would not want to go at it full time, just part time alongside what I do already.

Thanks in advance.