How are travel, accommodation, and daily expenses handled for Hudcon?

I’m curious how this works in the acting industry when someone becomes famous very quickly. Connor and Hudson became widely famous within weeks. Before the show blew up, they’d said they were paid very little and expected to go back to their waiting jobs after filming, and only didn’t because the show was so popular.

Since then, they’ve made appearances across North America and Europe. They recently carried the Olympic torch in Milan, Hudson walked the Dsquared fashion show, attended other fashion shows wearing very expensive clothing (Armani), and they both appeared at the Golden Globes, Vanity Fair events, and did interviews/shoots with Vogue, Vanity Fair, etc.

My questions:

Who covers travel and accommodation costs for things like award shows and fashion weeks?

Does CAA ever front these costs, or do they mainly negotiate for studios/brands/events to cover them?

Do they get a per diem for daily expenses on these trips, or do they cover personal expenses themselves?

are they paid for magazine shoots?

And when they are seen wearing extremely expensive designer clothing, is it loaned, gifted or bought (eg the armani boots hudson wore in italy)