Once you wake up from the party, open your phone with
and go to App Shop. Buy Car on Demand, Media Player, Song Sneak, and Director's Cut. Buy them by selecting them and then opening with
then hold
. Once the last app is purchased, the achievement will pop.
Also, don't worry about money. If you do this early in the game or right after you wake up from the party, you will have plenty of cash on hand.