I've been thinking about the financial end of things, too. When Alysa first came to prominence, winning Nationals at 13, she began winning prize money and having performing opportunities. I don't know how much income that added up to, but she was too young to go out spending that money hand over fist. She was years away from getting her driver's license, so no need for a car; she's said she basically had only skating clothes when she was younger, so I don't think she was shopping for a designer wardrobe at 13-15.
Her father may have invested her winnings and performance money for her and continued paying all or a significant part of her training expenses himself. The S&P 500 is up 140% since March 2019. Her father is a lawyer in a high-cost part of the country, I assume with an income to match; otherwise, how would he have been able to afford three pregnancies by surrogacy and Alysa's training expenses?
There must have been some money squirreled away, because that trek to the Mt. Everest base camp cannot have been cheap, and interviews with Alysa and her coaches have included references to extra costumes (more than one per program) since she resumed training.