Pahaseta wrote:About the fee. It feels terrible to take example 500 per person...of course i like to take money after all it is an extra reward for my own studies

I can open any car without damage and never been taught how to.
Your time and experience is worth money. This is something like 6 to 8 hours of class each day x 3 days? It think that would be worth 500 euro to learn how to open cars since they will start a business and make their money back. Do you have to pay for the conference space or hotel conference room? are you buying coffee and lunch for everyone at the meeting? These are all things that will take away from the money you make. Do the students pay hotel and for their own breakfast/lunch/dinner? Are you hosting any drinks at the bar in the evening so they can network and talk with other professionals to make friends?
For their fee, do the students get any t-shirt, car opening tools?, any books or printed manuals to take home and read? membership to a professional group or forum that helps them get business or new customers?
If this is your first class ever, perhaps it might be better to charge less? maybe 300 so it is 100 per day? but at that price, I would not expect free food or coffee or any alcohol in the evening at the hotel bar..
Squelchtone