LOL I never believe anyone when they say “once in a lifetime” on this forum. 
Be careful - you’re going to own DVC before you know it.
Some advice:
- Read the first post in this thread in its entirety (don’t read the entire thread, just the first post and maybe catch up on the latest couple of weeks at the end if desired):
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I agree that you should book your ADRs first and then let the chips fall where they may with regard to BG/LL/ILL. You have grace periods of 15 minutes around ADRs and 5 before / 15 after for LLs, so don’t stress too much. You can usually figure out a way to work everything in. If all else fails, talk to a CM about changing the time (not guaranteed, but worth a try).
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If you insist on having breakfast before an Epcot day (which is actually a great day to do breakfast), I recommend Topolino’s at Riviera, Ale & Compass at Yacht Club, or Trattoria al Forno at Boardwalk. Then you can walk / take the Skyliner into the International Gateway. You can even park at the resort where you have an ADR. You can schedule your breakfast on the early side to avoid missing out on Rope Drop. (Or just take it easy - up to you.)
Hope you have a fantastic trip!
P.S. When are you going?