£4 - £400 Community Challenge

Hi all,
Was thinking recently that if i could start with £4 on betfair and create it to £400 thought just following the tips of the knowledgable betfair community.
Im going to have this challenge in 2 of the forums Football and Horse Racing.
£4 starting in each forum so at worst i lose £8 which isn't massive.
The aim is to see how knowledgable the betfair community is :)