You will need only 2, maximum 3 cashiers to fully operate the upside down house 7 days per week / 11 hours per day.
About 20 visitors can visit the Upside down house at once, spending around 10-15 minutes.
Average price per ticket can be 4-5 euros
You can expect around 270 Euros during peak hours. If you’ll choose the right place for the Upside down house, you can recover your investment after 6 months.