The one situation I see arising from a 24 hour ER is the overload of sniffles and stomach aches wanting to be treated.

If that ER is open in conjuction with an existing facility it would eliminate a backlog of patients.

I had presented a plan to Mayor Paz about four years ago that would work something like this;

The SP town council takes control of the local fire department. It is curently a division of the National Fire Brigade. Have a Chief and 9 full time trained FF/EMTs to provide 3 full time FF's on duty each day. Augment this with a volunteer force of well trained residents. Provide a fire boat that would be equiped for fires and medical emergencies up and down the island. Augment this with the ACER team.
When an accident occurs the responders could treat and transport the patient to a local medical facility for stabilization and then airlifted to Belize City.
A local "EMS" board made up of local medical folks could oversee the training, equiping, co-ordinating and quality of the system.
With the connections that many of us here have I think we could pull it off with funding from the GOB, local business assistance and donations.
I am able to donate a nearly new fire engine, equiped with fire and EMS gear. I may even be able to get a fire boat partially donated. something like this...

http://www.responsemarine.com/pfrs.htm

Hose can be hooked to the fire pump and extended to a structure, getting water or medical care anywhere on the island in MUCH faster manner.

Just food for thought from an old 30 year FF/EMT.