I never tried on this specific site, but on other sites I found that the click rate is so low it's not worth it. Maybe I should give it a try though. Thanks for the suggestion.
Your hosting costs are probably very low. Since you're looking just to cover expenditures and maybe make a little pocket money, AdSense might suffice.
I already tried adsense on programming related sites. With a CTR of about 1/10000, I'd likely make 0.5$ per month (plus adsense is not really sexy :-)).