I'd get up at 5 and head out to carry two bags 18 or 36 holes 6 days a week then try to grab a few hours working in the bag room or the locker room. and then try to get a shift in the kitchen/dining room unless I could the shift car parking. I think I made 20K during the summer of 71. In three months, that was twice my yearly salary upon graduating in 79.
I earned gold with private lessons, helping kids of rich parents with their homework,. It paid during my study everything above the money for the rent of my room and a below bare minimum to eat (which I got from the state as childrens allowance through my parents)