Our pubs used to start us with 4x25s, 4x100s, 3x500s $ 1x1000. It sucked havin to call and get change from middle constantly though and is a pretty short stack as their games can only go about 3 hrs.
But 8x25, 8x100, 4x500 works nice as 3k torney using 100 and 500 chips to chip up. With this u can have 10 people, be able to chip up, and you only need 240 chips (20 each at start and 20x100 and 20x500 to chip up). with 500 chips you could easily manage multiple starting options using 1000 and 5000 chips if you wanted or more 25,100,500 if you want more chips on the table.
Games usually finish when there is around 20big blinds left, so 3k for ten people means 30k chips with the game gettin close to done by 500/1000 blinds.
25/50, 50/100, 100/200, 150/300, 200/400, 300/600, 400/800, 500/1000. (blinds option)
1/2hr blinds could make this a 4hr game and allow for a decent heads up battle.
so
80x 25s,
100x 100s
60x 500
would be ya min chips and you could add whatever to bulk out to a 300 or 500 chip set if u want