It is a community of tree houses that focuses on recycling and sustainability. They use very limited electricity, which comes from solar and hydro powers, and use many biodegradable substances such as paper.
It is a commitment of either one or two months. Volunteers are expected to pay their own way, and it is roughly $1,800 per person for a one-month stay and $2,000 per person for a two-month stay, and these prices include airfare. Food and bedding is provided by Finca Bellavista, but volunteers are expected to work for 30 hours a week, although they can split those hours any way they choose, such as 3 ten-hour days or 6 five-hour days, then use their remaining days to explore the rainforest of Costa Rica. Link to their volunteer page: https://www.fincabellavista.com/learn-conserve/volunteer-opportunities/