The unobstructed water views for both front STR units can be challenging to determine additional value compared to other 3-unit properties without views.

Interest rate on the home is 2.6%, so I don't want to pay down the loan with the additional income coming in.

If this isn't required, then most likely having the GC sign a completion guarantee to ensure the project gets finished and lender is not stuck with a partially complete asset is the case. 

Buyers usually want to purchase on today’s value while sellers often want to use future potential of the property (“current rents are below market” or “room to build an additional property”, etc) to increase the purchase price or likelihood of a sale.

Additionally, the price point is still cheap enough to find the 1% rule and positive cash flow and there's amazing appreciation potential.

There are also 'mezz' lenders (typically for larger transactions) who will cover up to 90% CLTV and require you to bring the remaining equity to the deal, and additionally there is Gap Funding in the form of unsecured personal debt.The latter can potentially be the most expensive option, but allows for true 100% financing as there are no restrictions for how to use these funds, as they are unsecured, and generally obtained through personal credit, income etc (since there is no collateral for obtaining these funds).

Essentially, it was one account with the bank tracking individual tenant details on your behalf.That said, it’s critical to ensure your financial records remain accurate by reconciling the account on a monthly basis.

In addition, the company that they recommend we work with, Prime, helped me set up my companies and though I repeatedly asked them if there were any differences in how it was set up because I was a Canadian, I was told that the way they suggested I do it was the right way.

Additionally, are there any other factors I should be considering when purchasing a duplex or triplex?

You don’t get to just expense the additional real expenses.