Here is a rendering by China Harbor Engineering Co. of the 8-12 story development which will surround West Oakland BART station.This is only one of the very large developments set to happen under the West Oakland Specific Plan. 

However, coming up with a new percentage reflecting services rendered seems a bit arbitrary.

He showed architectural renderings of new buildings with retail on the ground floors and residential above."

If we ignore the possibility of retaliation, I believe you would be legally obligated to pay her for services rendered, and would have to seek legal recourse for anything she cost you.If it was me, I would pay her (perhaps offer less than she claims she is owed), but make her sign a statement saying she has received payment from you in full and will not try to get any more wages from you.

I’m sort of just gathering opinions and trying to render a good and fair decision.

BUT, only a licensed attorney can render an opinion of title and explain matters of title, contract law, and what the documents mean.

It was render unto Caesar what is Caesar's and render unto God what is His.

Could this effectively render my deal not feasible?

Hey Mark, I just came across your post - I run a virtual staging and rendering company here in New York. 

-The above issue could be rendered moot if you have enough operating and administrative costs of maintaining a large portfolio of rentals.