I agree with @Ali Boone that turnkeys can be a great option for new(er) investors, particularly those with limited time and expertise to tackle more hands-on approaches.  

It will have ups and downs, you will make mistakes, but I have found real estate investing to be a rewarding endeavor. 

However as you correctly point out this is far more risky and or its risk capital compared to buying a income property.. but the reward can be strati-spherically higher .. not just a little bit but it can be life changing profits on some of these deals.

Some of my clients love the cash flow in the east side neighborhoods over by Slavic Village and Broadway selling between 90-110k with rents up to $1,800+, but just really depends on the types of neighborhoods you're investing in and your risk / reward threshold. 

That information and expertise also compounds over time.It's easy to be envious of investors in other markets that have seen massive spikes in appreciation, but we only see that in hindsight. 

But you do something that fits your risk profile and lets you reap the reward.

It would typically be negotiated in cases where the developer or engineer is adding significant value through their expertise, connections, or risk management

I would recommend to look into something more powerful for business/corporate usage.Section C is not my expertise, but I would recommend to follow  the law and have strong security policy such as minimum password requirements and regular changes.To end this on a positive note, Cybersecurity is slowly moving to the forefront of business thinking and it's taken more seriously now than 10, 20 years ago.

I have over 18+ years in the REI game and the financing side is my expertise.  

You will gain the rewards down the road.3) You 'should' claim rental uncome from any source.