I came across this spell ---> shining-south sticks-and-stones
{not sure about linking}
edit --- changed name again, Maat's tactic is superior.
Commoner 1 lets call her "mom", is Helpful and trustworthy to hold some cash for
Commoner 1 with Mercantile feat, lets call him Hannibal (historical reference for no reason).
Local Magic Mart has the sticks and stones spell.
Hannibal pays 150 gp and has 170 gp left, held by mom.
Hannibal allows the sticks and stones to attack him, killing him with one hit.
Spell expires and the originating "wight" is gone.
d4 rounds later Hannibal rises as a Wight, not beholden to previous "wight".
Mom hires 1700 other unskilled laborers at 1sp a piece, to stop by for some work ... (little bit handwavey at this step)
Hannibal kills each one rather easily.
1 Commoner = 1700 Wight army.
Yeah I know this is totally stupid ... but it's less time than the training for level 1 pun-pun.