I would think with, " 2 daughters, 2 Dachshunds, 7 chickens, 1 Peking Duck, a common snapping turtle and an alligator snapping turtle", you wouldn't have time for such foolish thoughts.😄
Before I bought a used engine for my ragtop some months ago I priced rebuilt 3.8s. Costs from the better local rebuilders were about $1500. for a long block
Transmissions can always be rebuilt depending on what you need; probably $500-$1000.
Windshields are still available but pricey, about $1000. Most vendors here have the rest of the glass available.
Most switches and sensors can be rebuilt or modified.
I think you could do it if you had a vehicle with an excellent body and frame (neither one reproducible) . But then with an excellent body and frame you'd probably have a nice car.
I also think you could do it for a lot less than $75,000.
Thank you for your turtle awareness. I am a retired zoo keeper (herpetologist). Mostly into native frogs.🐸 I used to raise baby snappers when I was a kid in Queens in the '50s.🐢