2500 EUR
There is a secret passage in the fireplace with portraits, and it leads to the next room. In order for the secret door to open, you need to collect all the portraits, and based on the hint, put up portraits of all members of the Weasley family with parents and children.
This puzzle can be changed and reprogrammed based on your task. Possible to open magnetic locks, activate another puzzle, play music, turn the light on/off. Just let us know about it to calculate additional functions.