I wouldn't be thinking in terms of what "I" could do to get paid.

I'd be looking for people who already do something and figuring out a way to hook them up with the people who need whatever it is they are doing.

I wouldn't care too much about that whole $50 - I'd be much happier with just 20 of it for building the playground and inviting others to come and play.

Once I had it figured out. I'd get lots of people playing.

Jim