Evidently when the building was built they were required to designate a handicapped parking indoors.

Should we consult a designer, architect or space planner or??  

Initially, my masculinity/bravado balked at the idea of taking an interior design class; but then, I said huh?

You can either pick a plan already designed from the company or hire an architect to do a custom one.

Equity Protection; Sale of Property(a) If a purchaser defaults after the purchaser has paid 40 percent or more of the amount due or the equivalent of 48 monthly payments under the executory contract, the seller is granted the power to sell, through a trustee designated by the seller, the purchaser's interest in the property as provided by this section.

When the lender sends an appraiser out to land that will have a house on it he needs architectural designs, blue prints, itemized costs for materials. 

@Regina Joners  What @Chris K. is referring to is the fact that in a 50/50 partnership there's no inherent mechanism to resolve disagreements.

I am a complete amateur in REI but was a General Contractor/mechanic for many years.

However, there are also those who would say that if you yourself are an independent contractor and file those taxes on a Schedule C, you are most assuredly "in business" and that you are required to issue 1099s, even though the reporting mechanism is essentially the same as the first example above.So what to do?

You can research it yourself, but I think what you are referring to is actually an advance withholding mechanism on any income or franchise tax that would be due IF there is gain on the sale of the property to the seller.