Notice that the pricing will come down. In Germany (where the market is mature), I can buy a 2kWp system for 500-600 EUR. Then your payback time basically halves...
as just confirmed in the press conference, the overall liquidity safety net is actually 200B CHF from SNB. Then 9B of guarantees from the Swiss government to UBS for potential risks
Additionally there are preparations to temporarily suspend noise/pollution legislation that forbids backup power generators to run for more than 50 hours a year [0]. While the current idea is to only exempt sites (around 300 sites, 250 MW installed capacity) that are already used by SwissGrid for Ancillary Services [1], there is political pressure to temporarily include all sites with installed backup power generators (> 4 GW).
If even a fraction of this installed capacity would run in times of shortages, this should further reduce demand without causing disruption on industrial production or even having to schedule rolling blackouts.