Ghostbusters vs. Army of the Dead (LotR)

The Ghostbusters with 5 billion in funds (80's) and 6 months prep

vs.

The Army of the Dead from Lord of the Rings

Battle takes place in empty field. Ghostbusters are free to hire as many people and build as much equipment within budget and allotted time.

Ghostbusters have full political support

RIP Harold Ramis btw

I would imagine five billion dollars would be enough money to make enough traps

A cross-streamed proton pack blast alone should be enough