I divide my 401k up, 75% T, and 25% R.
That way when i pull my 401k money out, the ROTH side can go straight into a rIRA and i can live off that until i can start up my ladder.
At least from my understanding that is a do-able way.
Another way is to start funding a rIRA now, and save up enough to live on that for 5 years until your ladder kicks in.