It's also not always true that elites have no issues either. Mirai? I believe part reason of her breakup with Carrol was money. Otherwise, she would've moved to somewhere that makes training easier, since she's not going to school; her family did have to sort out every penny for her. This is an American girl who basically won an Olympic, had it not been for Yuna, Mao, and peaked Rochette, the trio that made the '10 Olympics one of the strongest ladies fs fields.
Yuna is another. She began getting some sponsorship only after her 07 GPF win; that's pretty late considering her tremendous achievements prior to that point. Also, her Forbes-worthy income came after her 09 Worlds win, which of course counts into her reputation of the legendary records, favourite to win at Vancouver, history maker, modelesque-look, etc. etc., and '10 was the Olympics year! (and guess how much it would've risen had she been an American) Before 08, she basically couldn't properly afford little things like skate boots. (BTW, she made charities as soon as she was out of red books, before all the fortune.)
The reason why so many quit in Juniors is because unless they are SURE they'll be in elite squad or kinda reach for beyond, it's not worth the money to try. Hence, in most countries, only the elites and elite hopefuls persist, although we disregard most of them as lacklustres by comparing between the elites.