Hi
Charge 100 Euros if you want.
1. Some people will not come to see you because they won't value your service.
2. If you offer something that the guy down the road does for 30 euros, you won't be "worth it"
3. If you offer something DIFFERENT and are EFFECTIVE and develop your REPUTATION as being "good value" for money, then you will be worth it
Consider that people are happy to pay more money for a reliable car than less money for something that *may* break down sooner
Or that paying 3 times for something at 100 euros can save you money if you are better compared to 12 visits at 30 euros
At the moment, people pay about 45Euros for 15mins and 65Euros for 30mins with me. Pretty soon that is going up to 90 Euros. I am still very busy (thank God!) and most people around me charge 40-45 Euros for 30mins. I believe that i offer a different service to those around me. I also make sure i am the most expensive person in my area because i believe i give a very high standard of quality.
If you believe you are worth more, then charge more. You will soon see if you really are worth it or not