the problem is that you can’t mint ecash without being connected to the internet, and you can’t connect to the internet without paying

also using ecash is utterly stupid for this as not everything supports it compared to LN, and you have to use a “preferred mint” etc and any mint conversion mechanism already uses, you guessed it, LN nostr:note1sldhcs0l0uxkkajkwxynlj3f7sfkcltntu8rds97ckd8x4hfcvyqatlwj2