Powering 11 Individual Tracks

If you're going to be running on all 11 tracks at the same time with potentially lighted passenger trains or long trains, I'd probably consider a brick for each track.  100 watts would be marginal to run two trains, especially if one is a lighted passenger train.  For our modular setup, we were resorting to 360 watts for each loop as the 180 W brick wasn't enough for three trains with one being a lighted passenger train.

 

My take would be three TIU's and eleven bricks, you'd have individual channels for each separate loop.

 

Thank you so much for the information you hit the nail on the head, lighted passenger and long trains.  it's now convincing the other half on why i need to spend another $800

If you spring for Lionel PowerHouse 180 bricks, you could power two loops with those, they'll handle a couple of trains.  It's also possible to power more than one loop from a single TIU channel if money is tight, I sure would go for at least another TIU and perhaps three PowerHouse 180 bricks.  I suspect when you get to three loops on a single TIU channel, you're going to run into signal issues.  Also, you'll want to review the wiring practices for DCS.