moving a toliet

okay I am not new to the remodel gig. ya can find me over at JB forums. I do wild remodels. this one has a master bedroom that is being flipped. the toliet need to move 25 feet the other way. 3" pipe. it has 25 joists that 2x10. so you cant drill a hole in them and then cut pip down to 1 foot peices and then couple them in. I was hoping of notching the line out and just drop the log in the slot and then go back and shoot some sister blocks over the notches. i know it needs a 1/8 foot slope per foot. I was almost thinking cut a hole to the out side of the house run the pipe them pop a hole and run the pipe back inside. The drain for the 2 sinks and shower will be tied in to this as well. all drians shower and sink are going to be 2" lines. a new vent thru the roof is being installed and where the old vent was with the toliet and tub combo. I was going to leave and just stub it out in the attic and use a studer vent. This vent would be rite at the point where the drainage drops

You would be better off dropping below the joists, and building a box for the pipes.
Most of the time when this is done, the pipe is near a wall, and the other three sides are also boxed in to create a "drop ceiling" in the room below. It looks okay as long as you do it so it looks intentional.

Notching a 2x10 to lay pipe into is not a good idea.
I've never seen one done that way that would pass a framing inspection.

I agree terry. Below that is the kitchen drop ceiling which has the air duct in it now. If it was only 3 or 4 joist it wouldnt be that bad but basically all of them is a no go. the only other idea like i said was to run on the outside of the house. Its a upsatirs master bedroom. this would basically be the same as a drop ceiling. then just build a chase around it