First, let me start off with the fact that I would love to see a movie or movie series, real or animated, about the Honorverse like all of us would. And I agree that GoT and The Expanse can be very good examples for it. Especially the latter is a perfect example to make a very good Sci-Fi series based on books.
Second, there is already a Comic called "Tales of Honor" that could be used as a starting point for an animated series, if someone wishes to do so. And yes, I expect the cost for an animated series to be somewhat lower, but I'm not in films and might err here on the wrong side.
Said that, I think this is not the point nor is it the budget in the first place. Those of us who followed the "Axanar" incident knows that it doesn't need a multimillion Dollar budget to deliver a high quality short film that scared the hell out of some big Hollywood Studios and as a result changed all the rules for "fan films" based on the Star Trek franchise. This short film was financed using crowd funding and was driven by highly dedicated people as we all are as well. Or aren't we? We just need to know how to get it set up and get it done. Strategy should be to start small and grow tall. Why want a multimillion Dollar production if you can start small and thus convince Studios or Netflix, Amazon or other to finance its continuation? Prelude to Axanar (https://www.youtube.com/watch?v=1W1_8IV8uhA
) is a perfect example how to do it if you do not have big money. Maybe someone invite Alec Peters from Ares Studios that produced Prelude to Axanar to the next MantiCon/HonorCon and bring him together with David Weber and us as fans for an open panel discussion around this topic. We are dedicated fans and we are creative as well, so I would love to discuss how WE as a fan community can drive it instead of waiting for others to do it for us. I'm pretty sure that we can get a 15 to 20 minutes high quality short film done. And with that it is far easier to drive things into the right direction. Who knows, maybe we become the "Next Generation" and Star Trek will be a thing of the past. Nah, I don't think so, but someone needs targets!
Anyway, I would like to see that happen.
And regarding the discussion "introducing kids to Honorverse" I agree that this is a topic. But this is the good thing about the Honorverse compared to other Sci-Fi fanchise like Star Trek or Star Wars. We already have the Young Adult and the Anthologies Series of books which gives the Honorverse a more diverse appearance than those other franchises. And I remember to have seen an interview where David said that he even has a book series in mind with HH's children. So, we can even cover that one, if we want. Surely with Davids support. We even can strike two flies at the same time using the Young adults for the short films and thus establish the characters, the background and interest into this topic. But as I said, we need to discuss this and JUST DO IT!