In that case you made a mistake by asking about working with sites 'as is' because those who know anything already know that sites where the webmaster does nothing tend to do nothing.
It is you who seems to think you are being lazy, I certainly did not suggest you were! Many people have the idea, often fostered by vendors, that websites can earn money with no input from the site owner. You now know that this is unlikely to be the case.
Read my post objectively, remove from yourself the misreading that I suggested that you were lazy. Understand what I was telling you and see that in the context of your business.