Is there a separate line for paying the reciprocity fee, and do they accept credit cards?
Before she leaves the States, the OPs daughter should have her smartphone unlocked, install Skype (or equal) and WhatsApp, possibly a universal SIM card like OneSimCard for use until she can get a local SIM, take an ATM card, etc.
Since Argentina has a weird currency situation, perhaps she should take a lot of crisp $20 US bills for exchange at one of the unofficial exchange sites?