You have a couple chinks in your armor. 1) she put you on notice that the tree had issues (legally you are responsible for a tree of it's obvious that it's compromised in some way.

Lack of ventilation is clearly causing your mold/mildew problem, so a functioning window will help, and the larger the opening the better.It does require a match on the exterior finish material to fill in the size difference, but these baths are always on the side or rear of the house, so it's not very noticeable.The fact that it's a different size and more contempo-looking than the older original windows, isn't a compromise on esthetics, either.

Idk how big or good your PM is but the good ones I’ve met often won’t compromise their pay at all because they don’t need to.

Is this a good compromise?

Pass on this tennat, do not compromise your PMs policies and do not accept her as a tennat under any circumstances.

I don't know what type of loan he is using but I'm assuming FHA.We've worked out a compromise.

We were able to find somewhat of a compromise in Irving Park. 

We want to do it the right way the first time so we do not compromise our relationship and prevent any unforeseen events.

This seems like a very reasonable compromise. 

Business is business and should not be compromised by excuses.