My plumber wants to cut open the floor and walls in the upstairs apartment (which is currently rented) in order to cut out that whole section of the pipe.

Cavity walls are tied to the STRUCTURE using what are called wall ties, and they have very limited structural properties. 

If you have an exclusivity agreement with the buyer, then you would have to get the commission from the buyer and this creates a more defined wall of agency.

Bigger plus for women of color.

Maybe a two color paint scheme.Am I on the right track?  

If you buy here to hold, make sure you hold onto it for a long time - it will eventually pay off in spades, and in a very low-risk manner, but the cash flow won't look very sexy on paper for a while.Hopefully something in here is helpful to you, sorry for the wall of text. :)

She said that she was hearing noises in the wall and in the attic and claimed that it was "rats."

Should I remove the "Tudor" looking trim and just paint it all one color?

Such as laying flooring down, painting, molding and trim, covering a framed wall, tile and grout.

It's not typical to have walls and ceiling same color.