I'm looking to buy a 96 Plymouth Voyager but it needs a new cradle and control arm mount...?

It's bent pretty bad and has moderate vibration at 35mph. It needs additional work in plugs, wires, brakes and front oxygen sensor. I was told by a mechanic that it was safe to drive but would not be the most comfortable ride and that I would wear through tires. I'm looking at this van as a possible back up on the cheap for our current cars. The owner is looking to sell for 500$. Could I get anyones input please on what they think of this deal and the damage? I've even been told that it might be possible to bend the cradle and control arm back a bit to help "smooth out" the ride. Is this true? Thanks.