[Big Mike]

In a couple weeks I will be helping to run a tournament for a friend who is getting married, to raise some money. It will be shotgun style (multiple tables but a winner or two advancing from each to play at a final table). The guy who is organizing it wants it to maybe have rebuys available.
Also, some people have said they'd like to come but might not be able to make it until a bit later. I figure because of the format having one table start late wouldn't be a problem.
Lets say we have ~4.5 hours for this event. First tables play should take maybe 2.5 -3hrs. Final table the last 1.5 hrs. At final table all players will restart w same amount of chips.
Questions:

1) What would you recommend as a blind stucture for both sections, given time constraints?

2) How about that late start table? Should it start at a higher blind level to make it closer to equal with the others?

3) How long should I allow rebuys, and again, what about rebuys for that late start table?

Smallest tourney chip I have is T25. I have enough chips for any structure. Probable # of players is 30-40.

Thanks in advance for your advice!