The train ? yes they work well, all year around outside.
Off course you need to lube it once in a while,otherwise the metal parts will rust and wear out too fast.
Maybe Indian monsoon will drown it, there is a rain gutter around the top of the engine lid i lift off in the video to reveal electronics, it may be strong rain may be too much for that to keep up.
Mine is the Bachmann Spectrum line, thats their expensive line of trains, they also have some cheaper ones i belive is called big hauler series.
Also there is several other brands, some really expensive costing several 1000 dollars for a train.
Whats most important is making sure the train can go around the turn radius you have on the turns on your layout, i got this one as it have 2 trucks that independent so it can take the small turns on my friends layout.
I wouldn't use under R3 turns ( R3 is from LGB track it is as i recall a 1.4 M radius turn that most trains can navigate without derailing )
My friend also have R2 turns, those are pretty tight for large trains.
This was first time i ran it in my friends garden.
LGB track.
If you put the track on something solid i think it was LGB that once walked a elephant over their track and nothing happened to it, but off course if it is lying on soft dirt and you do that then the brass or stainless steel track will bend.
Powering the trains you can do several ways.
Normally you can used powered track, just like any small train set, but if its outdoor you will have to clean the track so the train can pick up power thru pickups or the wheels.
Or you can use battery power like we do now, off course you still have to make sure there is no leaves or whatever on the track, but as you dont have to pick up power from the track it dont matter if the track have a oxidized surface.
Train scales and the track they ride on, G-scale like mine is 45 mm between the tracks.