There is just too many variables to answer your question Kook....
I've seen some get a ton a money, some starve. It depends on alot of things. Flash, Agent or lack of one,and the type of Balloon store.
<ul><li> Bust one (build-up, collection) </li><li> mirror joints </li><li> bust 3</li></ul>
Just to list a few. So, what kinda balloonstore were you refering to?
Balloon WaterRaces don't count. Sorry.