This is more related to the justification of Fund spent by the sponsor and effort spent by the organiser ...

e.g.

This coming Singapore Open Group B,

Cash prizes -- total of $1,260

trophies -- ?

medals for Grade B -- ?

allowances for workers -- ?

others -- ? (drinking water, refreshment for prize-giving if any, etc ...)

easily, will come to a few thousand, say $2,000 or more.

Even if you use $2,000 to calculate, for 40 players, you need to spend at least $50 on each player.