When it comes to wargaming figures I suspect the answer would be never. One can constantly tinker, expand, redefine an army providing it with flexibility or customisation to deal with a specific scenario, time frame or opponent. This is not even raising the question of the delights offered by other periods, scales or forms of wargaming such naval or air games.
Last week the final part of my Imperial Roman army arrived, Numidian Light Horse, Balearic Slingers and Cavalry Commanders to complete my Roman Army.
Once this lot is painted I'll have a decent selection of bases to play the early imperial period. Nevertheless I am constantly tempted by further permutations of battle groups to expand the periods to play. Despite these plans I have made the vow, loosely speaking of course, not to acquire any more lead until the current figures are painted based and ready for action.
*Obviously enough is enough is when one's significant other tells you to stop buying those toy soldiers!