Like norules said, the only stat that can change your repair is WPF. If you have more WPF skill for the weapon you are holding, it decreases the chance it will be repaired. Nothing will lower the cost of repairing items.
If you want to wear your beautiful, expensive items but still make gold, try making a "light" and "heavy" equipment set. When you join the server, start off with the light gear. You should be able to make gold, even if you are stuck at x1 multiplier. Once your team wins a few rounds and you have a higher multiplier, switch to the heavy set of items. You should be able to maintain your gold (unless you are wearing full plate or have a very expensive horse).
Or you might find out that you like the lighter set of armor and stick with it!
