How expensive is maintence generally?

Just curious how expensive it generally to keep a P71 on the road?

I am not a mechanic and I am very curious about getting one.

I had a 1997 Caddy STS that was really expensive to maintain.

My wife wants a Honda because they are cheap, but I believe a man needs a RWD V8.
How would a P71 compare to say Civic in operating and maintenence costs?

thanks alot!