A musician, in our case a violinist:
250 euro ceremony
350 appetizer (for appetizer I recommend electric violin with bases).
500 euros if they want a duo for example electric violin and electric cello which is really cool.
750 euros trio of electric instruments. Violin, viola, cello.
1000 euros - quartet of electric instruments. With an electric double bass (mega ganzo).
The difference between a classical and an electronic violin is that a classical one is ideal for a ceremony, and an electronic one when there are already a lot of people communicating and it is quite noisy, then with the help of speakers an enveloping effect is created and the music is heard by everyone.
Example of an electronic violin