Here is a list of the power tools and equipment used in the making of animatronics:
Bench grinder (small)
Belt sander (small)
4 inch angle grinder
Milling machine (bench top)
An individual with a small workshop isn’t necessarily going to have all of these tools, but some of the tools listed will prove invaluable from the start. I would include a small belt sander and drill press in that category. Others, while very useful, can be difficult to accommodate in a typical home workshop (like a full-sized milling machine).