I came up with this idea that lets say I am getting targetted visitors say about just 20 per day for my niche whcih has low paying adsense ads; but if I add a page on my website targetting high paying keyword though not achieving high SERPS coz the competion will be high on google.. But visitors can crawl to my that high paying keyowrds page through my other current page which is high on google and maybe I can get the chance to earn more from those high payingg ads such as how about the keywprd school loan
Hmmm....Maybe I didn't get you correctly but it sounds a bit odd to say that one keyword can be high paying and another low paying although both of them are in the same niche.
All I am saying having top ranked for low niche keywords ; just add another page to your webpage lets say on " school loans" though the main page be on something else but if a vistor falls into this school loans page where there would be high paying ads close to 30$ per ad as the top keywords suggests then there can be chance to earn more can't be!!