Client tried to haggle my subpanel quote down to nothing but paid full after the demo

Out here in north jersey, zone 5 winters mean folks want their electrical rock solid, so I quoted this guy $4500 to install a 200A Square D subpanel in his detached garage last week. He starts lowballing me, saying he saw some DIY video and could do it for half, but I walked him through the NEC code 210.8 requirements for GFCI protection and how a botched install could fry his whole setup during a snowstorm. Took the time to show him the rust on his old setup from the damp basement, and boom, he signed off without another word. Proud moment, especially after seeing all the nightmare stories on r/electricians about cheapskates causing fires. Guy in Electricians Network FB group mentioned something similar with a client who backed out, but mine stuck. Finally feels good to stand firm on the value.

Man, that north jersey cold makes every job twice as miserable, glad you held the line.

Same here, clients always think we're magicians with prices til reality hits.

Document everything like you did, saved my ass on a dispute once.

Break it down with codes and risks, works every time on the smart ones.

I'm so over these know-it-all homeowners pulling up YouTube as leverage, makes me wanna quit resi work.

We all been there brother, keeps the blood pressure high but builds the thick skin.

How'd you handle the demo part without scaring him off completely?

Solid win, what's your go-to for quoting subpanels in older homes like that?