As far as I know, no one fiddling with frame relay stuff is even remotely talking about such stuff. You'll be famous. I know of some experiments and successes in reliable multicasting. However, at least some are like XTP reliable multicast, and intended for where it is good enough that most of the time most stations hear everything, as in a military network in combat. You have described a situation where any systematic failure of the wave to reach a single hotel or for the answer from that hotel will invoke the Dreaded Lawyers.
Lawyers are far less forgiving than enemy solders.
Soldiers generally stop shooting when you're dead. You have also described a situation dangerously likely to collapse any network. Today that happens about twice a week, when either someone soon to be less naive does it to themselves, or a malfactor forges it for for someone else. Today, it's good for receiving hundreds of thousands of email messages in 10-40 hours. You have described a system that might have scaling problems.