skylark,
i'm not sure if you last comment was completely serious, especially because you threw in the "LOL", but I'm going to assume it is serious
10:1 is a good goal, but i think it might be a twee bit hard. Maybe not impossible, I'm not quite sure, but you would have to have pretty much 100%+ CTR and relatively high paying niches. Something much more realistic is in the area of 2.5:1-4:1..maybe farther. Nonetheless, just don't expect too much of a ROI because you will set yourself up for disappointment