I'm beginning a garden railroad in a situation where track power is not a viable option. My plan is to use battery power, but this seems to be more complex than I'd anticipated. I'm not one to tear apart and rewire a locomotive; I'm a modeler, not an electrician.

So my question here is if I were to purchase a locomotive such as the Spectrum Baldwin 2-4-4 Forney, what else would I need to make it ready to run, and what's involved in doing that?