Or even substantially different. 

In my personal opinion, it depends on whether or not you plan to refinance and if the rehab you do will substantially increase the value.

Helping them do their job effectively and efficiently will make their lives easier (especially when the underwriter comes back and asks for more details to substantiate the number), and in return, make your life easier.

That been said, if your return is not substantial, it's probably not worth your time and money (and some aggravation).2. 

This will result in a substantial benefit to those that had unpermitted work.

Multiple, billion dollar companies are investing substantial amounts of money into our area, such as Intel, Google, and Amazon.

I have spoken with a couple of CA investors and they agree the project could potentially generate substantial cash flow.

(Although this is a sort of frozen market with substantially less buying activity right now.)

It is a given it will not meet 100% of your requirements, but amending the plat may be a simple task or already part of the standard code.Portland has increased zoning densities substantially.

Of course not everyone is bad and many ( like my company) can execute but we used Sub to for short term and we NEVER bought without substantial equity day one.