Eh no... Harry has Mining++ also known as partial transfiguration. Now EY didn't believe that to be enough so he also equipped Harry with an invisibility cloak a bag AND a suitcase of holding.

If Harry is really pressed for cash and some rules against arbitrage, stock market manipulation, insurance fraud (which he should be able to do to an amount that's not even funny to think about) exist, he still has one glaringly easy way of earning shit tons. He should be able to, as soon as he is allowed to use magic outside school (which IIRC is at 17 which is before his last year at Hogwarts' starts; the 31st of July to be exact) of doing the following:

a) Robin Hood his way through pretty much anything (Invis+teleport is an old classic) b) mine diamonds/gold/other valuable resources by using partial transfiguration, invisibility and if need be Apparation.Some mines in Somalia are just waiting for a wizard to abuse them... c) and of course just straight up gambling.

Sincerely: this stuff doesn't even require a lot of thinking. He could also just do some honest transport business of high quality wares... Teleportation is a whole lot faster than anything else I can think of.