Why?
Money matters...

The first due diligence looms on the horizon
The first (tax, social security, VAT, etc.) audit is just around the corner
You sell your business based on Excel not on code

Some links

• Startups.ch
  http://blog.startups.ch/buchfuhrungbuchhaltung-in-der-startphase-was-gibt-es-fur-moglichkeiten/
• Treuhand Schweiz
  http://www.treuhandsuisse.ch/