Of course he will take care of Harry in the sense that Harry won’t have to sleep on the streets or starve but beyond that, I don’t see him doing much more. IMO, he’ll be more of a you made your bed….
Any good parent is an "unconditional love" parent. And I dont think Charles is a bad parent. I think that he's a man who has been too busy at times perhaps to spend a lot of time with the boys, but he has tried. And IMO he was very indulgent with Harry, and pretty much gave in to him a lot.. I'm sure he wasn't happy with Harry leaving Royal life.. and the way he did it, but he didn't fall out with him. he remained in touch till H's demands about money probably finally drove him to saying No for the first time.
He continues to love Harry in spite of H's selfish and wild behavior, that's unconditional love.. But he has I think reached a point where he did finally have to say "No".. to say that he would help H get started in his new life up to a point but that he couldn't for example go on paying for security and expenses indefinitely. That doesn't mean he doesn't love his son, it just means that he realises that to keep on giving in to him will not do H any favours.
If things go south with H in America and he ends up coming back home I'm sure that Charles will continue to support him financially and to remain friendly with him. Tat's unconditional love. He may not spend a large fortune on him.. he may be very wary about his son coming back to royal life.. but that does not mean that he does not continue to love his son and stay friends with him unless Harry completely walks out on the relationship.
He may put limits on what he will do in practical terms... but ANY parent has to do that. Most of them are restrained by a lack of money, but also even a rich parent will put SOME limits on how much help they will give to an adult child. I doubt if Charles is going to say "you made your bed son, so now all you're going to get is a little flat in a corner of Buck Palace".
But he may well say "look this is what Im going to do, you can stay in Frogmore, and I'll pay for security..and continue an allowance but I expect you to stay within that allowance." Would it really do Harry any favours to let him live high on the hog for the rest of his life, if he's not going to be a working Prince?
That would only crop up if Harry were to get in some sort of trouble...or, for instance, run though all of his money. I don’t see him begging to return, certainly not as a working Royal.
I dont think H will want to return but if his business dealings in the US dont go well, he might need to. He's taken on an expensive house, he has probably used a lot of Diana's fortune and so far, we're told, he's not getting paid for anything in the US. Presumably he's waiting for his deals with Netflix to result in his doing some work for them and then he will be paid for the work that he's done. but if Netflix drop him and no-one else picks him up, what will he live on? It might happen that he and Meg have to come back., IM sure she will hate it but she'll do it if she has to. And Im sure Charles will do his best to help his son find some kind of a new life in the UK if he comes back.. though he will probaby be wary of talking intimately to him.. or may impose some kind fo silence deal on him.. i.e. saying that he will help out but that Harry doesn't talk to Oprah and her likes any more.