Costs of training to become a bell ringer How are you defining costs? In the context of cost being a barrier to progression in sport I think it would be interpreted as cost to the individual or family, for example buying equipment. in ringing there are hardly any such costs. The most notable would be the cost of transport to events, but while I am sure lack of transport limits some ringers I suspect it's not the monetary cost so much as th time cost.
The tuition costs, which would be born by the family of a child learning a sport are invisible in ringing because they are invariably born by the teacher and supporters as opportunity costs, which get overlooked when counting cash that changes hands.
In short, I think it would require great care to do a meaningful financial comparison between ringing and sport. You would need to take in many other factors and try to find valid equivalences.
And sadly, any valid lessons to emerge from such an analysis would probably fall on deaf ears because 'ringing is different' and 'ringing isn't like sport', and unlike in the real world, ringers don't like to talk about money and ringing in thee same sentence.