Wall and floors will likely not be level there are usually multiple additions from different decades and building codes, if any.

The code inspectors have files on the property but they're all marked closed.  

I would check with local city codes and make sure what licensing is required, you are essentially operating a hotel model.

If the Legislature and Governor don't alter the "ramp" on the City's current police and fire pension payments, the tax hike is not enough to satisfy state law and prevent state tax dollars from being diverted from the City and into the pension funds. 

I also try to "break" the product before it ships.I work closely with the developers to make sure the code they write does not negatively affect our product in anyway. 

They should be vented to the exterior otherwise they only serve the purpose of being a coarse particulate filter and do little for the air quality within the premises.In the IBC/IRC and building code in many, if not most, jurisdictions range hoods must be vented to the outdoors.

Best way is to obtain authorizations for release of credit, tax returns, assets and liabilities, then send copies or get several originals to use, mail them  and obtain information directly from the source, this cuts out the chance of fraudulent statements.You also need to underwrite the type of business, what hazards are present, toxics, fire, insurance coverage, competition with other tenants, traffic counts, environmental laws applicable to them as well as your infrastructure being sufficient for tha use.....electrical, plumbing, traps, fire codes, etc. 

The term "real estate professional" is a specific nomenclature in the Tax code that has specific costs and benefits which (I believe) are different than what you're talking about.

There are separate entrances, and it would be incredibly easy to reformat the floor plan to make this home an up/down duplex without doing too much to alter the current lay out.Does anyone have experience with the city with this process?

These are professionals with additional training and a stricter code of ethics.