Ha ha, you're welcome to copy and paste to do so yourself!
Most royals and aristocracy have huge wealth based on landed estates stolen by some baron at some point in the distant past, which creates wealth. Or massive funds created hundreds of years ago (don't mention slavery and empire, whatever you do).
The upper echelons just waft along on inherited wealth, a bit of charity work is tax efficient and raises their profile, makes them feel good about themselves.
Harry has cut himself off from this. He actually needs to earn a living but the only thing he knows how to do is the charity window dressing. Sure, he's got a lot of money but security and fancy houses cost a lot too.
However the money side of things is taboo because you do not mention money (most of it was dirty money at one time or another). So he's got to somehow earn a lot of money without seeming to do so. He does not have the brains or the instinct to do this, and to be fair his opportunities of doing anything like a normal person are pretty much nil.
If he'd married a less ambitious person, he could have disowned royal role, kept a wodge of cash, swanned off to run a wildlife reserve or something and been perfectly happy.