Ironically this comment is entirely against the concept of the guillotines which were invented to ensure equality in executions. Whether noble or common we all got the quickest death, beheading. No more of the terrible, cheaply made hanging stands which wouldn't break the neck thus slowly strangling the punished.

Much less wood needed for a guillotine as you don't need a platform for the drop. Less metal working, as nails are harder to make than a single large metal blade. Less workers as it can be assembled by one guy. Much less chance of it failing too as once built human error has little chance to cause problems. Pull the lever boy (Gronk). Previously, the hangman could fuck up on the knot which had to be custom to each that died. Weight, height, neck strength, length of the rope, all mattered. Easy to fuck up.

Equality In death.

Edit: assembled, not built. The blade was made by an expert the rest could be made by anyone with experiance working with wood.