Well this is my first post on this board, hope not to offend or disrespect anyone in anyway. I think you shouldn't skimp out on buying a "cheap" inline ML, if you do? well next year you'll have quit muzzle loading or you'll be looking for an "up grade" so there goes $$$$$ down the drain!
Black powder hunting can be one of the best hunts that there is , as long as you got a gun you really like!
Get you an Omega\Thompson Center\,Knight, or a Remington Inline, 50 cal. you'll be glad you did!
What's another $100.00 or so when your really getting what you wanted in the first place!

good luck! hope you get the gun your looking for!