if you dont mind me saying so i think you need to learn to walk before you try and run.
yes it is possible to double head and tripple head locomotives. particularly if you are using a digital control system. in america this is called consisting.
regarding the track metal, the rusting issue depends on allot of things. how often are you going to use it? are you fussed about the look of the yellower metal? how damp is the house? to make a climb up to a second floor you are either going to need a train lift (in which case there wont be any gradients) or a spiral in which case your trains are going to spend a long time going round and round quite possibly out of view. this i would find unacceptable but its your house and your layout.
I think you need to do allot more reading and allot more planning before you commit to anything.
you might also want to concider something allong the lines of a sky-trestle system. i think it looks daft on its own but it might be a way of having a mainline in one room and the loop in another.
http://www.locoboose.com/SkyTrestle/O-Scale.html
Peter
yes it is possible to double head and tripple head locomotives. particularly if you are using a digital control system. in america this is called consisting.
regarding the track metal, the rusting issue depends on allot of things. how often are you going to use it? are you fussed about the look of the yellower metal? how damp is the house? to make a climb up to a second floor you are either going to need a train lift (in which case there wont be any gradients) or a spiral in which case your trains are going to spend a long time going round and round quite possibly out of view. this i would find unacceptable but its your house and your layout.
I think you need to do allot more reading and allot more planning before you commit to anything.
you might also want to concider something allong the lines of a sky-trestle system. i think it looks daft on its own but it might be a way of having a mainline in one room and the loop in another.
http://www.locoboose.com/SkyTrestle/O-Scale.html
Peter