Thanks to OGR FORUM-ites who affirmed my existing MTH Z1000 transformer and already-installed DCS Remote Commander would be more than adequate for the MTH Aerotrain (equipped with PS-3) when placed on my modest-size L-shaped layout for its inaugural run. That loco will be the ONLY MTH train on the layout. All my other locos are either Lionel TMCC or LionChief+.
I know some hobbyists have wired their layout with BOTH Lionel TMCC and MTH DCS wiring in place and simultaneously active; both brands of locos run fine. However, I wired my layout through a low-tech knife switch; one side of the switch connects a Lionel 135w "brick" through a TMCC Command Base to the track, the other side connects a MTH Z1000 with DCS (through a Remote Commander) to the track. I don't want or need to run Lionel and MTH locos on the layout at the same time.
Four lockons connect track power around the layout through bus wiring which works great for all the Lionel locos. I'll soon know if my existing bus wiring will satisfy the MTH loco. I know MTH recommends "star" wiring, but I hope I can avoid installing a duplicate wiring path with a "star" pattern for distribution of track power to the Aerotrain.