Help!!! Home tourney suggestions........

[David]

We are currently in the process of putting a "home" tourney together. Need suggestions as far as starting chip counts, etc..... Here are the particulars we have settled on so far. We want the tourney to last approximately 4 hours.

Game-NL Holdem
Rebuys-unlimited first hour w/addon at break
Buy-in $55
Rounds-20 minutes
Addon-double chips of buyin
Players-25/30

We were thinking of 1000 starting chips and rebuy when under 1000 gets you 1000. Addon gets you 2000. Start blinds at 25/50. What blind increases do we need to finish in approximately 4 hours. Probably no antes.

I was thinking......
25/50,50/100,100/200,break
150/300,200/400,400/800,break
600/1200,1000/2000,2000/4000,break
4000/8000 until end.

workable?