Outdoor roller hockey rinks would get built first to let hockey culture marinate over course of 10-15yrs. Maybe an adult and a kids rink on each side of city. $100k per twin rinks with floodlights and grandstands to make it feel "big time", akin to Rucker Park in NYC for basketball. multiply by 8 would be $800k that acts as the foundation to build hockey. Ice infrastructure would come many years after this. The idea would be to drive competitive roller hockey to the point where it make sense to build ice infrastructure as a logical next step. Of which, a base has been built, and although there may a gap in talent level it would be much smaller than had high quality roller rinks not been built. Would be foreign to start most likely but over time would get diminished as kids in region have been playing competive pickup roller hockey for a decade at least prior. A natural bridge if you will.
If and when outdoor rinks get built, would pack a sea container full of used blades and outdoor stick for kids/youth (u14) and flood market for cheap or maybe free even. 15 and over would have the basics available too but at more full sale price. That's how hockey would get its Jumpstart down there. Costs about 15k to get a sea container from Montreal to Buenos Aires and trucked two days to Ushuaia at very tip of SA.
Not necessarily specific to ECHL, but maybe curious about potential northern hemisphere A/AA labor pool during our summer. The euro leagues play 52 games vs 72 for ECHL (sans euro competitions).
The revenue side would come from media rights, streaming to Northern hemisphere. National sponsorship as well. I'd goto someone like Starlink for title sponsorship if it was today. Streaming free for all Latin American IP addresses. Tickets would be dirt cheap for locals. It's more important that people show up then extracting money from them. Seating bowl would be 3/4 standing room and maybe a club side with seating and a cantilever roof over top. The idea is to bring hockey back to the time when it was for the "working man". Cheap, get in the door prices for a great atmosphere that only Argentinian know how to pull off.
League would fund junior leagues and a development tree. Recruit from roller hockey rinks in region but also plant them elsewhere in country overtime. USD goes pretty far down there..
Could even approach big soccer clubs like Boca, River Plate, Racing, Colo-Colo for an owner-operator lease model similar to what the MLS is. Attach big brand names to clubs. Could probably auction these off to pre-approved clubs when infrastructure gets built out.