I understanding wanting to be tooled up...but from what I learned. Buy what you need and incur the extra expense of next day RED deliveries over having tooling you just don't use. ...
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This ^^^ !
But, to get started this is my suggestion:
Don't go the cheap garbage route on CNMG, DNMG, VNMG or WNMG.
Get one of the good brands, but make sure they are in fact a standard. ( Sandvik sucks )
Those are the OD tools and get 2 of each!
Get a decent set of CCMT bars ( 1/4, 3/8, 1/2, 5/8, no need for much bigger ) for ID work.
Get 2 of each.
Get 2 sets of Top Notch holders. They may not be the best for any ( or all ) of the work you do, but you can find just about everything that will fit a TN to get you by.
Get 1 laydown threading holder. ( Sandvik sucks here too )
Get 2 GTN cutoff holders for 3mm inserts. One is to start with, the other is to save your ass when the cutoff shit happens. ( and it will happen )
Drilling, just get 2 sets of ER32 with a shank that fit in your turret. One for spot, the other for drill.
Get 2 sets of ER32 collets! Not1, but 2 !!!
If you have larger boring than 1", then get 3/4 and 1" CNMG boring bars.
Get 2 of each.
For all else that WILL come your way, Red-Brown or Fed-Ex is your best friend.