IF you haven't figured this out by now, I'll tell you. It's not that I'm really arguing, I just have to rebuttal every single thing. It's kinda like a hobby, so if you ever wish to end a debate with me, just stop posting. Look, I've been on the internet long enough to see people ask for something and then get told to get everything else but what the person asked for. It's annoying when you're the person asking, and it's pointless when you're the person giving "advice."
Look I just take a person on their word. Yes, in theory he could get a job and save up and if he said that, i would've recommended something else. However, I make it a point not to confuse my goals and my needs with his. After 5 years on the guitar, yeah I got a job and after 2 years (i started working when i was 10) I was finally able to throw down for my first real amp, sound board, cords, and various other stuff, because I had the goal of becoming a real musician. On the other had, my brother played keyboard for 10 years and he still has the same one I got him 15 years ago. His goal is to be a hobbyist. FYI, he doesn't suck at the piano, he's a quality player just doesn't have the interest to invest money into that particular hobby. I like going hiking, but at the same time, I don't carry the top of the line gear, because I don't need it for my purpose.
It's fine to give advice like what you are doing when the kid is clueless and just say hey I need a keyboard this is my price range. However, when he comes in telling you exactly what he would like/needs then...what real purposes does it serve to give him options that are 1000 dollars more than his price range and do more than what he needs. YES in the future he MIGHT want better gear and yes HE might want to become a profession pianist, or he might just want to jam out in his basement. If he finds that he does want to expand, then it isn't exactly a sin to create a new thread and make a new request.
As a reply to your edit, did you assume he put a lot of effort into it? I've played drums for 5 years and I know 10 yrs who played for 5 months better than I do.
And this is all considering the fact...that his current option is no keyboard or a 400 dollar one.