Find the scripting that identifies money, find where it is defined and create a new one by copying and renaming, perhaps just money 1 for the time being.
From that it's then just rename it right? If it was something simple like VB.Net it would just be.
Dim Money as Integer (The standard one already implemented)
Dim Money2 as Integer (Your new one)
When you load the character from scratch it would be
Sub New_Character (the new character sub)
Money = 0
Money2 = 0
Health = x (whatever it is)
But I know Unreal Engine is a lot different, I haven't got a machine that can run it or I'd see what I could figure from trial and error. Maybe see if you can scavenge any code from Borderlands 2 or TPS to see how they got the Eridium/Moonstones in?