the school maybe able to provide a letter just confirming her registered address :) have done this in the UK before - not sure if will be any different if for any reason they don’t accept your submissions already :)
So, pick which country you are applying from, pre save all the details but leave out the location you’re at, then once you arrive at the country you’re applying from - update application and submit from there.
You’re meant to stay in the country you’re applying from, until the visa is approved, or denied.
I mean, it’s one of them… you could submit, could get approved. But then, you could submit and they refuse it. At which point they may have you reapply, and pay again.
If it was me, I’d cash out to bank, get a statement showing balance and move it back. Seems ridiculous, but if it’s just for the bureaucracy, kinda have to go with what they say I guess.
You could then also include your binance statements as additional proof of available funds.