Answer:
In terms of money I would say,
cycling: Advantage- Doesn't have to pay for classes necessarily, therefore saving money every month or so.
Disadvantage- Will have to invest in buying a bike if they don't have one initially.
Running: Advantage- Very cheap, barely needs any equipment if they don't want to invest in high quality gear e.g running shoes, running clothing
Disadvantage- (Not so sure on this one) Maybe because it's quite tiring?
Step-by-step explanation:
Just carry on with the idea of money and how costly you think each one would be and how effective it is in the fittest side of things.