Hi, Perk,
Pricing is always a difficult area but, I personally believe it really depends on the area you live in.
If I were to quote $100 for a portrait, even though it was a one of a kind, personal project, I wouldn't
get another request, yet alone any sales.
I also try to use grampa Paul's formula but, my price per hour isn't very high.
That being said, the best price is one that makes you and the customer both happy and brings
you more sales.
Good luck and God Bless! Spirithorse