What about bringing back all of the separately available tenders that were available around 10 years ago? I could use several. Especially the small one that was behind the 52 inch driver ten Wheeler. And the medium oil, Vanderbilt tender.
I haven't seen that track before. I would say that if you can find a piece of O scale track, try it on there and see if if fits. If so, then you can buy O scale track. Bachmann's O scale track has 3 rails. There are other 2 rail O scale tracks out there if you Google "O scale 2 rail track" From Google - "O gauge model railroad tracks typically have their rails spaced 1.25 in (31.75 mm) apart with the United States National Model Railroad Association (NMRA) standard allowing spacings between 31.75 mm and 32.64 mm."
I did what you want to do a bit ago for a Christmas tree layout.
I isolated each section with two plastic rail joiners. I also used just one power supply (at first) using the Atlas #0220 controller. I later changed it to use the Atlas #0215. It worked out pretty well.
I did that because there was a higher risk of shorting out (think tinsel, foil wrapping, cat, dog, etc.) and did not want to risk my DCC locomotives. DC locomotives are more robust against shorts, I think. If there is a short, it just stops working rather than burn up your decoder. Of course, that is only in my limited opinion.