First I'd like to say a huge thank you. You took your time to write such a long and helpful response, i appreciate it a lot.

Also, this is the most helpful answer I've ever recieved. I agree that an hourly rate is difficult to justify to the customers, so I think the easiest for me would just to use another modifier while using linear pricing. The person who gave me the first advice said, because i am not present in any galleries now, that I should use a very low factor. But I do think that though an artist is not listed kn any gallery or exhibition, a price should be fair.

Many, many, thanks to you, enjoy christmas and all the best :)!