Hmm, sir clavel, it seems na tanong mo is specifically how do low-income, low position katulad ng example mo janitor/waiter can afford to provide decent education. Kung at this point in time... wala, no hope.
Pero kung in the future pa papaaralin mga kids... Parang tanong na rin how to succeed in life from that point... eto:
Don't think na masipag ka lang ayos na... nope. You need:
1.) Extra initiative... and make sure nakikita ni boss.
2.) Kaibiganin mga co-workers... to limit backstabbing.
3.) Customer is number 1 attitude... aabot din kay boss yan.
4.) Most important: show a sense of responsibility... kung nakita ni boss yan, he will give you more responsibility, tapos little boss ka na. (for sure ito, mga boss mahilig na may reliable utosan...

)
5.) Kung ala pa rin ginagawa si boss, maghanap na ng ibang boss na papansinin ka.
Of course, yung 1 - 5 na yan, from the start dapat gawin. Kung ngayon lang yan e... grad na mga kids bago ma-afford yung decent education.
Parang ang dali no? Pero how many can actually do it?
Dito sa amin, isa sa mga highest execs namin galing sa janitor... believe it or not. Lahat ng kids nya mga professional... pati parents nya binilhan nya ng little business for livelihood. Eto yung catch... for every 1 person like him, mga 50+ don't make it... parang kasi di nila kaya yung responsibility. Yung di ko pa ma-gets, ang dami ayaw magpa-promote.