4000+exact search $10+cpc what is worth?

I just wanted to know if I did everything correct and ranked 1st for that keyword, a nice ctr theme, good onsite and offsite optimization
fast hosting... what would be the monthly income from a site like that.

does anyone has any idea or worked with one like this?

help would be appreciated so I don't spend my time and money for I have some unique other income ways.

thank you!