If you are thinking of doing something that could be given as a special gift, it's a nice idea. I personally would not be interested in this as I am capable of doing my own

, but I imagine others may be.
Depending on the detail you intend to include, it sounds like it would be a massively time consuming exercise (I hope you wouldn't charge by the hour

), and doing something like this by hand you would need to limit the generations covered and be practical regarding paper sizes etc. Are you thinking of offering different styles of tree for example? Or a long scroll on parchment with illuminated text, medieval style?

(I'd like one of those

)
I would imagine that something similar, but without the same depth and character, could be achieved and mass produced cheaply using one of the computer art packages, then printed using suitable colours and inks. I think this is what you would have to compete with.
Perhaps in this economic climate it may not be the ideal time to consider such an endeavour as money is tight. But it is a very interesting idea to go back to doing something individual by hand rather than mass produced on the computer. William Morris would approve.
