I am thinking that it can be used by a small medical practice, veterinary, dental. etc. 

I will explain in greater detail.I put alarm systems in all my houses in addition to smart lock and a smart thermostat that are all linked to my alarm system and a amazing web interface from Alarm.com. 

In addition, I would recommend posting your screening/income requirements in your ads! 

I do know that lending can be complicated with a sponsor and a less experienced person on the deal, but I know a good lender to go through, so I am confident that it will be possible to overcome that obstacle.In addition, this is a relatively small deal.

Or does it mean any additional fees through closing would be paid by the Seller?

You need a warranty deed to buy or sale at full price.Is there any additional info you can find on the tax assessors website about the property?

Any help would be greatly appreciated.In addition to the sites I mentioned above, how do you go about finding good contractors? 

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

Additionally, the lot is splittable into 2, 3, OR a "cottage court", which allow up to 8 buildings on the property (this is all confirmed with the city and I consulted with a friend of mine who is an engineer and has drawn up several of these cottage courts and says its feasible). 

Many cost segregation firms, provide the extra service at no additional charge, to fill out the form on your behalf.