Crackone, I see what you mean, but in most cases people would have had a "dry run" for a decent period of time b4 putting on real money, so by doing the hypothetical exercise described you would have a fair idea what you are likely to be staking over a period of time. But apart from this, one would imagine that you also work backwards from what you expect to make, i.e. for arguments sake you want to make $1000 a week , you expect to make say 15% on turnover (so work on 10%), so you need to be "investing" $10,000 a week, say there is an average of 40 bets a week so you need to be investing $250 on each level stakes and an available (hypothetical) bank of $25,000 i.e. 100 bets, though where one would get cold feet is something else, if you start off into profit you're ok, but if you start off into a long losing run, who knows???