Basement Bathroom Plumbing Questions

[James Konvalinka]

Hey All! 

I am wondering if anyone has experience with adding plumbing for a full bathroom in the basement of a single family home here in Milwaukee, WI. I am currently looking into a property that I am planning to flip with a partner of mine and had some questions about adding plumbing in a basement. Our plan is to finish the basement, add an egress for a bedroom and a full bath however there the basement does not have any plumbing for a bathroom. 

What are some things that we need to be aware of when adding a bathroom in the basement?

How much on average does something like this cost? 

Does anyone have any tips or tricks they have dealt with that they would be able to share to a newbie flipper? 

Any info is very much appreciated! :D