When you have all 99 gold bricks go outside Mos Eisley Cantina and build the lego tower(requires all 99 gold bricks)the lego tower is between the minikit created area of episode 4(IV) and episode 5 (V)then cose a place around the tower(I usualy go to the front of the tower.)and wait there for around 50 minutes to 2 hours by the end of the 50 munites to the 2 hours you will have millions in studs I got "20,159,180 studs" in a matter of one hour but i had score times 2 and 4 on while getting said amount so you should stay for a hour or longer>