My instructor has suggested that Steampunk may be a bit overdone, unless I bring something really new to it. The Old West part may not be different enough. So, for now, Steampunk is still in, and Old West is out. I want this to be unique, with an original aesthetic, but still within this genre.
I suggested an idea that I think will work, and I'm going to put it in my initial proposal. I'm keeping it under my hat for the moment, until I get some feedback on it.