Maybe do chores for your dad? In return for inflated fees.
I still remember, coming back home from college during the semester break, and broke. My father called me up and told me that he won't support me a single cent during my semester break - he pays very well for me during school terms though.
And you know what, I ended up working for him a couple of days - 3000 riyals richer. :)
Oh BTW, that was like in the late 90's.