My recommendation to serious real estate investors is buy an opportunity in any segment, do the math (it's all about the ROI; some investors fall for the 'commercial' is more prestigious chest thump to find that losing money isn't very prestigious at all), and plan on proactively running a business. 

Can't find much online....  

Its more transactional than a traditional sale so you want to find out who the decision maker is and negotiate with them.

HOWEVER, you can still find deals that hit the 1% rule and positive cash flow.

Connecting with local GC groups in your area will help you connect with subcontractors, find out tips and tricks of the trade in your local area (since all areas and their real estate differ slightly).Also, have you considered the motivation behind building a brand-new duplex versus finding one on the market?

Here in the USA you need what's called a "construction loan" and it's also very hard to find a company that will insure you if you're a newbie.

I couldn't really find much else in my search.

How did you find this deal and how did you negotiate it?

If you find a good deal someone will take it.

Without any cash it is unlikely unless you can find a 100% seller financed deal (they do exist, I just did one a few months ago).