If it were a commercial deal with leverage involved, not one bank would give them a loan.

Keep in mind this property is relatively turnkey with most capital improvements completed within the past 5-7 yearsIn the middle of the month of May, I get a call from my tenants saying that their electricity got cut out and the oven and air conditioner don't work.

In most cases your better off buying with "All Cash" and then you can use a "Delayed financing" program to get up to 80% cash back LTC loan to cost.

Cash, developer financing, gaining citizenship, using a margin loan from an investment account or a heloc on your primary in the US, seller financing, etc. are usually the best options as bank financing with attractive rates and terms usually isn't available like we're used to in the US.

Where can I find a broker that can source out a construction loan for a spec home?

Rates will be lower for a 2nd home loan, but as Michael stated you will have to acknowledge in the loan docs that you will not be renting out the property.

Seller often think "Where will I get the money to loan you?"

Some hard money / private investors have minimal loan amount restrictions. 

Best, I'm looking into a bridge loan at the moment, and figured I'd move them to an LLC later.

My plan is to use a first-time buyer's loan program, live in the property for a year, and then turn it into a rental property.