Dang that's crazy. I'm going to try that right now. You do upgrade your pickaxe though right? Or do we have to get 40 attack then get rune, then mine 1-50?
just buy all the pickaxes before you start. then as you level just use them. + I don't know if it will make you as much money as i have on my other account.
F2P Mining is the most profitable skill. As it was mentioned, you can easily get 2m for a simple amount of work.
It is quite easy to turn a profit for higher level mining. As well as getting your smithing level up.
Additionally, if you are botting, with a high enough Woodcut level, you can cut Yew Logs, They are very expensive on the GE and it is quite profitable As well.