Quiet neighbourhood (practically no noise from cars or people), warm shower, free fast reliable WiFi, clean house, meeting many different people in kitchen, close to nature (beautiful walking area just around the corner in 10-minute walk), 20 minutes from train stop, technically competent and always helpful host (if asking right questions), privacy in tent and backyard guaranteed. Tent equipped with folding bed, mattress and sleeping bag. Possibility to use cooking range, rice cooker, stove, water heater, washing machine, fridge. Tap water drinkable (no artificial chloride or muddy taste). Possibility to change from tent to room if places are available.
Advice: When staying in tent, wear ear plugs since airplanes arrive and departure just 13 km away in Geneva airport. Moreover, there is a loud speaker of some jungle bird singing on a nearby field. In addition, rain drops falling on tent and wind moving the material might cause extra disturbances.
Bring C-type electrical chord adapter(s).
Bring extra buff to keep head and neck warm. No need to worry about feet as the sleeping bag is isolating enough from outside air.
Train yourself to clean after yourself, especially right after cooking. The place is used by and shared among many.
Buy your food from nearby centers as the only grocery shop in Coppet/Commungy is opened from 07:30 to 12:30 in the mornings.
Transport: renting bicycle ~12 CHF per day, single train ticket ~6€ for 2 hours, useful for going to Geneva.
Food: If possible, take something with you. Buying locally is going to swallow the wallet, especially meat products.
All in all, best option for non-smoking non-partying introverted people who value peaceful nature and quiet work space with proximity to Geneva as center.