.#2  I like some of your research and my guess is that based on all you have said it will not actually go to sale. 

I actually got my real estate license partially for something to do and I enjoy the work (maybe because I have other sources of income from my rentals and dividend stocks that more than cover my living expenses, so I’m not desperate for every commission like some agents are.

Code § 7701 - Definitions, my understanding is that the answer is NO, but maybe I am wrong.As the actual rate of withholding is 15% of the sales price, and as the refund (if any) would be "within 90 days", it can be a major setback for my company´s flipping cash-flow because 15% is way higher than the taxable income (and of course than the tax itself), so we would be in the necessity of capital injections to flip the next properties.If any of you have comments on this, it would be very helpful.Thanks in advance

No reason to charge them for 5 minutes of your time.

If the projected tax savings outweigh the cost of the study within a reasonable timeframe, it may be worth pursuing.Given your qualifications and involvement in the property, you likely have a good understanding of its components and renovation costs, which can facilitate the cost segregation process.

It's not uncommon for CPAs to be left out of initial discussions when structuring real estate funds, and there are several reasons for this:Historical Roles: Traditionally, attorneys and general partners (GPs) have taken the lead in structuring real estate funds, with CPAs brought in later to handle tax and financial matters.

It does not matter if probate was opened or any notices sent out or anything similar.I understand your reasoning, but it is a constitutional due process issue that you cannot take someone's property away from them without due process of law, which includes notice.

Or completely reasonable?

As to the actual question, I'm not aware of any law that would force you to provide a screen door.

It's the best you can get and they track actual leases in your market, not what Sally thinks she can get for her converted garage.