Yeah 29 Euros is a bit high, but then again if you budget it... and only get a couple. However you'd need to sell a few hundred copies of your game (considering the cost you set $5 or so for example) to get your investment back.

I'm planning on doing something similar for Garland's Quest. I'm contracting out my graphics and going royalty-free for my music. I may have the main theme done custom though. Something that will be common throughout the run of games and expansions should I manage to get that far. First I need to get the first game and it's engine working.