Tom - Unfortunately that was not a misquote, he even said that this is the way he had just done his house. I even know that was not right.
Terry - Thanks for the info. Sorry about not communicating this in an understandable way. Here are some other views for context. Blue is basement walls, Green is first floor, and white/orange second floor walls.
Is this what you mean about the tub and lav?
Is the toilet drain doing the 180 long sweep bend crazy? I came up with this design because the 4 in cast iron is the main stack and and it turned flat original under this original location for the toilet they had laid a cast tee on its back to connect the toilet. There was/is nothing upstream to wash any solids down that were high in the tee although we had never had a problem and amazingly there was no build-up when I took it out but the bottom of the tee was very thin. arranging it this way allows the solids to reach the vented section before continuing down. The alternative I see to this is going downstairs opening up the wall (plaster) at a bell about 2-3 feet down using a Fernco and street Wye, bring the vent straight up over and connect back up to the roof opening, Then connect the toilet to the to the other leg of the wye using a 45 then up, 1/4 bend, over, then closet flange.