Specifically, we're exploring whether constructing a duplex and triplex or two duplexes would be the most profitable option.

Not before that long it could become more interesting for you than for us here.Now, for us building a portfolio of rentals (and btw also an option for Americans), we avoid this by not doing it as an individual but with a company (SL) and changing it to company tax (first two years 15% and after this 25%) and creatively deduct way more costs.It is true though that this is a good way if your strategy is to reinvest your money time by time building something bigger/passing it along to kids/relatives etc, because when you want to take money out of your company you would need to pay dividend tax or in the form as a salary.   

Once the home is permitted it will significantly open you up to more lending options without any cuts in value or LTV. 

Any other options that will cash flow?

kevin There are both lease purchases and lease options. 

We're looking to raise money for a down payment which is why I considered the line of credit option.

I can definitely tell you there's still a lot of positive cash flowing and 1% rule deals.

A major component of my skillset has always been grit and being able to outwork others, which I don't think my current position is able to fully utilize.

New construction is certainly a viable option but I am seeing people have great success with the renovation of existing properties.

I am pretty much in this same position literally.