It's a legitimate question.
You should also consider that as a counter to your possible x.xxx$ worth protection software there is always a 0$ worth copy program like httrack that will just copy your entire site for offline use, no questions asked (including no right click necessary).
If it's about content, think about e-books, games, music, movies, tv shows. If it were possible, I'm sure that the money the companies behind that can front for such a solution are way above your top limit. Yet, there is no one to sell it. Their efforts are more about losing money coming up with protections that are hacked in matter of days.
The only thing you can do is to seek justice in courts against those that profit from your intellectual propriety in an illegal way.
Other cheaper solutions are those that always look to constrain the amount of content a user can see at a given time. Like, for example, you only put a part of the song, for preview. Or only a few pages at one time, not the whole book. Those have also the purpose of giving the user a taste, as to convince him it's worth buying.