alosso:
edinpa: Not nearly long enough. Far too many expenses for playing A GAME !
Concerning balls, we have the choice of less expensive or even free items. We get about 10x 9 holes from a sleeve, so you may choose your own "green fee"
Ten 9-hole rounds is pretty low for a sleeve. Most balls are 120 hits, so that's 360 hits per sleeve. Since putts don't count, I figure about 20 hits per 9 holes (reaching 7/9 greens in regulation). That means you can get around 18 rounds of 9 holes per sleeve. Even if you only reach 5/9 GIR and one of the four misses requires two shots, that's only 23 hits per 9 holes, coming out to over 15 rounds per sleeve.
Of course, if you're losing the ball in the water or OB, all bets are off :)