Well, when I was planning this layout I thought long and hard about having a streetcar line. There are several reasons why I decided not to have an operational one, here they are in no particular order.
1. Downtown Toronto streetcars of the 50s were single pole, running under wire supported from guywires running off utility poles. This is really hard to model accurately and reliably. Most traction modelling uses pantographs and catenary because it runs better. Tension of the overhead and reliable contact between pan and wire is key to smooth running.
2. Cost - Orr girder rail, needs to be soldered to printed circuit board (over 3' x 12' this is a lot), proper trolley model by Bowser, unpainted, no pole is pricey and would need painting etc. The Bachmann trolley is not good enough to actually run.
3. Space: to be true to the prototype I'd need 2 sets of tracks, they would have to loop and that loop would obviously be behind the city. Unfortunately, that's where the trains are running. Run the trains along the front you say? No, sorry, Toronto doesn't look like that.
So, you see I'm stuck. I would have to spend too much time, money and space. Perhaps one day I will build a streetcar module... but if so, I would do it in O scale. All the good PCC models are O.
Val