Some time period detail:

[b]Finances:[/b] Mercenaries during this time period were either fighting or raiding, and sometimes both.  During the earlier edge of this time period, it wasn't overly uncommon for them to go un or underpaid.  There were several sources of cash that companies would usually go after:

[u]Payment:[/u] An honest day's work.  Usually expected to participate in the battle more competently than the peasant levies we are replacing.
[u]Raiding:[/u] When mercenaries go unpaid, they may raid there former employers lands.  Taking small castles or forts and holding them for ransom to our employer is not overly uncommon.  After the initial raid, it would be common for mercenaries to demand 'protection' money from the towns.
[u]Ransom:[/u] When you capture an English Man-At-Arms, A knight, or a warhorse, you don't kill them.  Historical ransoms have made countries go bankrupt, and anyone our company captures we get to sell off.