Should I call it quits?

Picked up a 1970 duster this year. Not in the best shape
The body is rusty but some body work has been done by the previous owner. The interior is all there. So I said sure I will pick it up.I started to
take the interior apart. No surprises until I took
The passenger side a pillar trim panel. Found that
The hole pillar is gone.

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Does any body sell a pillars for a duster?
I also found holes in the floors and rocker panels
And the fenders. That was expected .

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I feel like I'm over my head on this one.
I should maybe call this one to far gone