Amphigori,
As you asked for general advice, I just remembered something that you may need to know beforehand: the way german people manage in-game money.
At ConQuest (and I guess in other garman LARPs too?) in-game money is made of copper/silver/gold colored coins, which are very realistic.
The downside is that in-game money has a "real" value of ~0.30€ per coins. As far as I remember you get a couple coins when you start the event, but that's about it.
If you plan to play a wealthy character, you may want to buy your own in-game money before the game start. There's also shops that will sell them in the merchant town (on top of my head, I remember the "McOnis" shop selling some).
Depending of the size and occupation of your group, you may also want to buy a couple copper coins to get things started. For example I played in a large mercenary group (~80+ people depending of the years), and most of our contracts where paid in gold pieces.
However it was really hard to find people willing to change gold pieces to copper, and thus individual pay was really hard to manage.
I don't know how kiwi LARP, but for example in Welschland (French-speaking Switzerland) it's really unusual to play LARPs in campaign, we usually do one-shots.
In those games in-game money is usually provided by the organizers, we don't keep it at the end of the event; Thus we where quite surprised when we found out you have to "bring your own money".
(That's a foreigner point of view, if there's something wrong feel free to correct me
)