The following is a matter of preference, but if I had too little time to have a decent structure, then I would start more shallow. The time spent splashing around with 200 BBs is better spent during the mid game, IMO. Also, have shorter breaks. If you are playing 3h total, you don't need a total of 45 minutes for breaks.
Using my advice above, I would use
@BGinGA's 1st structure but with T2k stacks. That's 100BBs, so a middle ground between his two suggestions.
lvl sb bb
L1 10 20
L2 15 30
L3 25 50
L4 40 80
L5 60 120
remove T5 chips
L6 100 200
L7 150 300
L8 250 500
remove T25 chips
L9 400 800
L10 600 1200
remove T100 chips
Should end around level 9. 10 minutes is enough for the first break, 5 for the second. For a 3h tourney, that leaves 165 minutes of poker. I'd have 20 minutes for levels 1-6 and 15 for the rest. At level 7 there shouldn't be more than 3 or 4 players left, so reducing time is ok.
That's good news, how long?
If it's one more hour, I would add a 80/160 level, and spend the rest on increased level durations.
If it's two more hours, I'd start deeper.