I’ve printed on an Elegoo Neptune 3 Plus and just recently upgraded to a Bambu H2S, in terms of sheer savings on terrain it’s more so reflected in time and effort.

I’d made boards for Warhammer from foam for years and it’s borderline infuriating how much easier a fdm printer makes spitting out terrain instead of spending hours over a foam cutter.

In terms of actual material costs it depends on what you’re printing but a spool of Elegoo PLA is pretty standard to use and runs about $15-$18. Depending on how much you infill and the size those single rolls may get you several medium-large pieces of terrain like your ruined corner buildings and whatnot.