C'mon, do the math!
590 XPs is but 2x 18 holes (200 XPs each) plus 2x 9 holes (95 XPs), also in practice mode.
Easy to do in a few hours, as the rise to levels 5 and 10 in one day suggests.
Taking the CDPs alone (ex any strokes or rounds boni) results in
4040 XPs in one week (level 22)
12680 XPs in two weeks (level 31)
28888 XPs in 31 days (level 40)
Not in this case, but it is the patient multi-accounter's cheap way to a high level hack.