Look at the clubs first: All Starters.
Thus, it might be difficult to fit three wedges below a 90 yds PW ;)
My 2 Pfennig: Two short wedges now (50/75 or 60/80 yds), and the third (+-100) later, with a custom iron set. This provides the opportunity to buy a better third one, adding more stopping power.
Another budget improvement would be a 3WD (e.g. the G20), easily outdriving the Starter driver.
Regarding the balls, any custom ball is better by miles. Just start with the 10 credit cheapos - small deal, big win!
And a warning: Any improvement in equipment will lead to Master tier, making more buys necessary.
Edit: Typo