Open a Betfair account here and try this strategy for yourself.
If you don't fancy backing anyone EW in the 30 man Tour championship field, trading the event is a good alternative. I'm going to outline a pretty simple trading strategy I use in this type of scenario: Basically I'm going to dutch (split my total outlay/stakes on all my selections so that each would return the same amount if 1 of them won) my three selections of Snedeker(26.0); Mahan(21.0); Stricker (24.0) for a total outlay of €153.32 (see screenshot - click to enlarge).
I'm now going to target odds of 4.0 and place an order to lay back my whole €153.52 on each of the three players. Should either Snedeker, Mahan or Stricker then hit these odds of 4.0 in-running, my lay bet will be matched and my whole tournament investment will be covered for a freeroll. Please note that all three may fail to hit these odds.
Should the tournament go well, I would personally then look to trade fully (green up) around the 54 hole mark (even if 4.0 hasn't been hit) but this can obviously be volatile. Exiting after 36 holes can be a decent option if your guys are in contention. Obviously you can be bolder and leave it until in-running in round 4 if that's your preferred style. Give it a go if you fancy it: have a look at the Tour championship market here and try this strategy for yourself