You might not like this response, but it needs to be said. Anything worth
doing is worth doing right.

Ok, so I take it that your answer is NO to both of the 2 ideas with regard
to the staircase issue. I'd like to know what's wrong with the first idea,
since I'd still have a PVC connection from the house to the curb except
that, in one section, the 4" PVC pipe would be pass through an existing
section 6" clay pipe.

Thanks.

Jeff