What's a synonym for "financial power"?
With his newfound _____, he ....
The idea being people who have ___ can throw their weight around, gain better representation, etc..
The word doesn't have to itself mean specifically "relating to money" if it can idiomatically be used to refer to economic power.
"Capital" seems like it would fit, but this has too specific a meaning. The word I am looking for more so describes a business or individual who, after investing some capital (be it originally time or money), makes massive return on their investment, and suddenly has great ____.