We’re not going to lie, Switzerland is an expensive country. However, we’re also big advocates of the fact that nature access is free and that there are plenty of things one can do without spending a cent: hiking, running, snowshoeing or simply enjoying the outdoors.
In addition to the coliving price, you’ll have to budget for your groceries. Here it obviously depends on what you decide to buy, but in Switzerland it’s reasonable to assume that you’ll spend about 50-70 CHF per week on groceries.
I would say that counting on spending 2000 CHF for a single person and 3000 CHF for a couple (coliving + groceries + some activities and restaurants) a month is a realistic budget. Obviously, it is possible to spend quite a lot more if you want to go skiing in Zermatt or Verbier, paraglide, go to the restaurant every day, etc…
If you decide to stay in the shared room and go mainly for free activities (there is a lot to do for free), 1300 CHF is a reasonable budget for a month's stay.