To give you an idea of what can be run with a z-1000 brick:
This year on my under tree layout I ran, two trains (with smoke on), 6 lite cars (only two were LED), my 2 loops of Fastack had one command switch(on track power), one Operating/Uncouple Track Section(on track power), and a two small building lights(incandescent).
Since I just purchased the brick this fall I was just happy that it all ran. I don't try to push the limits of the Z1000. Also, I don't think I tried to fire the switch and the Uncoupler at the same time.
Since you seem to be budget conscious, MTH offers a Z1000A. This is what I purchased. It's the same transformer brick as the z1000, it was $25 cheaper. You just don't get the controller for running conventional trains, that you get with the Z1000.
"I was thinking the Lionel GW-180 180 WATT."
If you buy the Lionel Powerhouse 180 ( I am assuming that is what you meant) it doesn't come with a controller either. I don't think the new GW180 is available yet, which does come with a controller unit. It has a MSRP of $279.99 in the Lionel 2019 Catalogue.
I do understand from other Forum members that the Powerhouse 180 does have a faster circuit breaker. There are plenty of threads here on that subject that you can read.
Mark W
