Browsing Amazon's tool selection, I came across this:
An orbital drywall sander with vacuum hose attached. Too bad it's $431! It uses a 9" round sanding disc which is huge.
Home Depot doesn't rent it, Lowes has no rental equipment in the Sacramento area (based on their website), but Sunbelt in West Sacramento does have it for rent:
Why is this exciting? I dislike hay embedded in my kitchen walls: