Laura it's slightly confusing, you say 5 days total but then you list 1a, 1b, 1c, day 2, day 3, final table. So is that 6 days total or is the final table on day 3?
Regardless, let's assume the final table is on day 3. And assume you want a 10-handed final table.
SO, you have: 450 players X ($30,000 + $5,000) buy in for total chips in play of 15,750,000.
Your final table will usually form somewhere around an average chipstack of plus or minus 20 to 25 BB's. So if we run that out for 15,750,00 divided by 10 players equals average stack of 1,575,000. 20 BB's would put the blinds at 39-78k, 25 BB's would put blinds at 31-62k and so forth.
SO, that means that towards the end of your day 2, your blind levels should be, for example:
25,000 - 50,000
30,000 - 60,000
35,000 - 70,000
40,000 - 80,000
50,000 - 100,000
The final table could form at any of these levels, depending on the action, most likely at the 35-70K level, but you have to budget time to go beyond as short stacks will hang on tenaciously towards the end. Each blind level should have a strong ante associated to encourage active play. The bottom line is that since you don't have a time limit to exit the building you can play until the final table is reached on the evening of Day 2.