I did it in my gap year for about 4 months.

I was 18 and the company I worked for took the piss a bit with calling me at 4 in the morning to do all the shit jobs....

Don't know what the pay is now but for an 18 year old I was earning about £500 a week gross [ten years ago ] but I got so annoyed at being taken the piss out of I fucked it off.

I was only young.

Get in with a decent firm, buy a cheap van [I had an ex royal mail AstraMax - with 4 x 12" subs ] and go for it!

A bloke I know does it still for some avionics company and he does ok out of it, I'll try and get their number for you