I would let the sellers know that I took pride in knowing everything that was on the market and not just what was in the MLS, ASK if I came across a buyer that was not a fit for my listing, would they co-op with me?

@Evan Pickvet-Hall Your agent might be referring to the fact that you might not be able to qualify for typical home mortgage programs as most lenders prefer SFRs to even 4 units (even though they are both classified as residential). 

I fixed what was wrong, as we both saw fit. 

Usually if you're talking about existing PVC pipe you can just as easy put in a new flange, glue in or rubber gasketed.In all cases, yes the flange must come up in height to fit level to (or, preferably, just on top of) the new floor. 

Reach out to a few and see who is the best fit for you.Good luck!

I'd be happy to have a conversation with you to see if we are a good fit.

P.O.S. inspections were developed, I would argue, because municipality leadership was unable to devise programs to HELP homeowners with their properties. 

Don't get the two programs backwards. 

And then to talk to people implementing the options you're considering to determine whether it is a good fit for you personally. 

More specifically, you can just buy the off-the-rack windows from places like Home Depot or Lowes and redo the openings so it fits them.