The quest that leads to building Skip’s Diner begins straight afterMiranda Rights concludes, when Wiggum has done his second Springfield patrol. It begins level 18 in your regular gameplay (although I well beyond this on my XP bar due to playing the game and visiting friends – but that’s perfectly normal, so don’t worry if this happens to you!).
Homer and Comic Book Guy should have been free as Chief Wiggum finished Miranda Rights Part 4 (while Marge isn’t really needed, keep her free as well to be safe):
1. The Only Sport America Still Dominates Something’s happening at Krusty Burger that’s got Homer excited:

Homer: I’m gonna win it!Marge: If we lived somewhere else, you’d be a shoe-in. But Springfield is the obese-est American town not in Mississippi! Homer: I couldn’t live with myself if I didn’t try!The hamburger-eating contest begins and Homer, Comic Book Guy, and Chief Wiggum all enter. Comic Book Guy and Wiggum eat at the Krusty Burger 4 times and Homer eats there 5 times to complete this quest (each visit goes for 30 minutes – keep Comic Book Guy free as Homer finishes his final visit):

Naturally, Homer beats out Chief Wiggum and Comic Book Guy and wins the grand prize – five more Krusty Burgers!
2. As American as Apple Pie Part 1 Comic Book Guy is still hungry, though and goes to eat at Krusty Burger one more time (30 minutes)
3. As American as Apple Pie Part 2 Still hungry, Comic Book Guy goes to Gulp ‘n’ Blow to satisfy his superhero-like super-appetite (60 minutes)
4. As American as Apple Pie Part 3 Still hungry and convinced that Springfield needs somewhere classy to eat, Comic Book Guy prompts the build of Skip’s Diner ($35,500 and 24 hours)
5. As American as Apple Pie Part 4 Satisfied, and comparing Skip’s to that diner in the monie “Diner”, where everyone dined at a diner, Comic Book Guy goes to dine at Skip’s Diner (4 hours and apparently the Worst. Quest. Ever. Keep Homer free as he finishes)
6. It’s A-Me-Luigi! Despite all the hamburger eating, Homer’s in the mood for pizza – as long as he doesn’t have to build anything. That’s the cue to begin the Luigi’s build ($51,000 and 24 hours, unlocking Luigi when the build finishes)

