They may have used both the movie, but the Citation in the picture that you posted, is a Citation V.
The 700 is an Aerostar, made by Piper. I don’t know about the widow-maker part. My experience has been it’s an honest airplane with a high wing loading. It flies pretty good on one engine (personal experience).
The Aerostar sure looks great.
But the Baron is a better choice IMO...those fantastic double-doors are great for loading and the fuselage still has good structural strength...a bit slower though.
An old Baron is a low-cost way to go...stick in a Garmin glass cockpit and you have a nice setup.
Worming past the pilots seat to get in the other seats on an Aerostar is awkward.
One thing about the Aerostar, they did not put in an audible stall warning.
They figured it was not needed since as you get close to stall the buffeting of the wings is so intense you don’t need an alarm...you will be alarmed already :-)