My understanding is that showcase and ref fees are paid by DA (not by clubs or players). There are no the hotel stay requirements for DA. DA offers travel arrangement services, but teams/players are not required to stay at specific hotels. Scholarships are done on a club-by-club basis, but DA does require some minimum level of support by clubs (not sure the percentage). Some clubs advertise the scholarship opportunities, while other clubs you have to ask. Players can apply directly to DA to get travel expenses covered.
DA Showcase events are stay and play. Teams are required to book their rooms through Anthony Travel.