Well, since apparently black powder is extremely expensive, and one dose can only fire one shot I'm either going to have to re-roll my character or do an entirely different class. I didn't imagine that as a gunslinger, I'd only be able to shoot five shots before having to wait a long time to get the money to be able to shoot another five shots again.
You have gunsmithing. You can literally pull gunpowder out of your ass due to the abundance of materials with 90% discount to the price. Hell, you can even loot them from enemies fairly often depending on who you are fighting.
I would suggest re-working of your character, though.
You have extremely low strength, It's not in the area of 'maluses' yet, but I would recommend bringing it up to at least 12. You already have trouble carrying your own musket around with 10 str.
Also, your ac is 13. That is really problematic. I don't really want to kill off characters, but I'm not really going to GM godmod the game to guaruntee party members' survival. Don't be surprised if you die off in about 2 sessions if you are going to stick with 13 AC..
...Also, get a sabre or something. Gunpowders and muskets are -not- reliable. They are not modern day assult rifles. It may get broken, it may blow up in your own hands, hell, the gunpowder may even get wet. So prepare for a melee at all times.
How much gold are we going to start with?
Refer to your class page, you may spend as much as your class's average wealth lets you.