For some perspective, 43% of the population have a gross monthly salary of 4000-6000 CHF (or 48k - 72k yearly). Even at the upper end of that bracket you’ll struggle to save an investable 100k in 2-3 years.
Rough estimate:
72’000 CHF less approx. 20% for taxes, social security contributions and pension fund - or 14.5 CHF - makes for a net salary of 57’500 CHF. Less 33’500 required savings over a three-year saving period for that 100k target figure gives a remaining 24’000 CHF for living expenses (among them health insurance and health care for an approx. 3000-4000 CHF per year alone).
Can you live on 2000 CHF a month? Probably somehow.
Do you reasonably want to, if you make less than that?