I would like to set up a large loop running between my sons' rooms and going though the wall.  This will end up being about 78 feet of track.

I'd like to run 3 or 4 Thomas engines (Thomas, Percy, Gordon, James) with each pulling a few cars.

Will someone please let me know if running this number of engines on a single track at the same time is even possible and what power pack I'd need.

I have done a little research and somewhat understand I need to run power through wires to various points of a very large loop so there will be equal distribution.

Any other comments would be appreciated.

Thank you,
Adam