It helps a lot if you can hit at least 60% with some paying $1.70+

This place staking plan does work & can take a lot of pounding before the money runs out.

If you Target horses paying $3.00+ for the win & bet them to place ,they nearly always have a dividend around the $1.60 mark for the place.

You must have the bank in place before you take it on .

Try & bet only in races with 8-12 runners.
This improves ones SR

As for selection criteria.
One could target the TAB 1st & 2nd(If fav ia paying $3.00+ OR 2nd & 3rd Fav (If the fav is NOT paying $3.00+ for the win)
& bet the one with the best Wt. Rating as per TABQ e.g. 100,99,98 pts. ect

Let us know how you go.

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Cheers.