Dammit
250k was still a shit ton of money back then, not a round trip to the grocery store like now.

Assuming they purchased that home in 1980 at 250k that would be valued just under 1 million today after inflation.

That house would easily be selling for 2 to 3 million now

That value may be inflated due to the film.

I’d like to see comparative properties in the same area

Recently Sold Homes in Winnetka IL - 13 Transactions | Zillow

Browse data on the 13 recent real estate transactions in Winnetka IL. Great for discovering comps, sales history, photos, and more.

Zillow
So I mean after all the damage that Kevin and the wet bandits did to the house of course they needed to have renovations done.
Keep the wet bandits name out of your lying mouth. It was all Kevin. The wet bandits are the real victims here.
Truly! Boobytraps are illegal as hell. Kevin would be having multiple attempted murder charges.
Zillow estimates 5.7 mil.