Hi Welcome to the forums.
My advice would be to start trading with something less competitive, everybody wants to do the consoles and the competition is tough and the mark up low. Look through this forum for people doing the same, you'll be reading all day
Have a think about something more unique, I run a wholesale business and am suprised daily at what people are making a lot of money of. One of my customers makes a very healthy income from just selling cufflinks.
I have friends who have a very successful full time business selling second hand subuteo sets and collectables. both jacked in the day job and live in a massive detached house in the dales.
Sorry i'm babbling, happy browsing