A successful businessman probably earns more than £500k, it's really not as hard as everyone makes it out to be.
The pharmacist that I once worked for invested £100k when he opened up his own pharmacy and in his second year he was already turning over £1.2m, with profits of near £300k. On top of that he's a landlord of 5 properties - all occupied by tenants. This is just him growing. He's only 30, and he opened up his pharmacy at a location where he is opposite superdrug, around the corner to boots and surround by 3 independent pharmacies that have occupied the area for over 10 years.
It's how you play your cards, when you play them, the research and the hard work that you put in.
It's just an example and it relates to me because we grew up in the same estate, went to the same primary and secondary schools etc.
It's really not as impossible as some make it out to be.