Let say you start work at age of 24, 100k/72mths is about 1.4k saving per month.

Not sure what's your job and salary, for average it is normal.

if 1.4k is like 10-20% of your salary, I think you better save more if not much commitment.

As for investment, not expert. I do research and learn from internet and others, so invest on your own risk.