((Basically a "Loft" layout, but enclosing half the upstairs -to be a more private upstairs bedroom with it's own toilet & sink))....

I believe the PM lives an hour and a half away (purchased PM business that we were previously using) and didn't visit the home before sending out the plumber because they didn't seem to know any more details about the invoice than what was written in the description.

So like if I replace the windows, or renovate a bathroom I write that off but if I buy new blinds for my half I do not write it off.

I spend half the year in Indonesia where me and my wife rent a home.  

The ground is now about 4-5 inches below the foundation line and it's also causing issues with my neighbor's adjacent yard.

My father still lives in the Poconos half the year and it's still the same way 40+ years later. 

To classify all syndicatorNope you are very wrong , it is the other way around, I invested since 1990s.I primarily avoiding investing in 2005 era because MacDonald guy can buy half million house.

Do you think it will have to be cut in half?

Now, we are out of the identification window so we are left with either trying to save the current deal (which involves accepting terms that weren't initially part of the deal or call it quits and pay the capital tax gains on half of the proceeds from the sale.Are there any other options that would be worth considering?

The good news is that your brother will be on the hook for half the costs since this likely happened when he was partial owner of the property.