If the insurance company finds that it was not really occupied, the most likely thing is they will make an adjustment to your premium as a non-owner occupied if they offer such coverage and pay a loss and probably cancel your policy.   

Once the bid goes to 0% there is usually a premium.

For the first, increases in rates will decrease the value and extend the duration/weighted average life (WAL) of the security (decreasing value further); and because many MBS investors pay a premium when buying the security (more than 100% of par/principal balance), a prepayment of 100% of the principal can cause losses too (if you paid 103% for it, e.g.)IF they have to sell that debt and interest rates are higher they're going to lose a lot.  

The greater the LTV ratio of the mortgage, the greater the rate of the insurance premium {you can visit the CMHC premium calculator here to get an idea}.  

If not, that will need to be factored.Bottom line, I highly doubt you'll walk away with 1531 a month, unless you got a very premium location, and you can charge high season rates all year long.

Then add ALL costs related to holding the property (utility costs, insurance premiums, property taxes, loan payments, etc.).Concessions: Concessions are what you give back to the buyer at closing.

The markets are very good this year to sell and you may be able to get a premium that you might not be able to get in 2, 3 or 4 years.If you sell, use the proceeds to buy more distressed property at least 20% of discount to current value minus repair estimate.  

You are paying a premium to make it worth the investors time and risk.You make monthly payments until the loan is paid off, or (ideally) until you can refinance with more favorable terms.  

It sounds like you have the option between a vacant duplex that has been fixed up and you just need to find tenants vs. an older duplex with tenants in place (that are paying below market rents).In general, there is often a premium for vacant units if market rents have been on the rise.

Then add ALL costs related to holding the property (utility costs, insurance premiums, property taxes, loan payments, etc.).Concessions: Concessions are what you give back to the buyer at closing.