Missed the boat
A few spare kidneys will do the job lol
I agree with Gavin, plus minimum 30k for minor rust work and paint. Then you have running gear, missing parts that you will need to buy (new aftermarket or old parts that need fixing), interior, wiring, wheels & tyres and the list goes on.
Best to find a really clean example and enjoy that one and add your own mods to your taste.
But its all up to you in the end.