The house has been on the market for 136 days, so I may be able to negotiate a lower price going into the down season.My down payment is 3%, and closing costs will be factored into the mortgage.The amount for principal, interest, property taxes, insurance, and mortgage insurance would be around $740-$760/month.

Are you actually making any progress on your principal? 

Even the principal is subject to loss.

Its an asset that is principal protected and offers a great rate of growth.Think of it this way: if you can get money at 5% and safely invest it at 6%, how much would you want?

Fair Housing laws do not apply to landlords who own a building with four or fewer units and who live in one of them as their principal residence.

My thought was that it is extra assurance that they will get their money, and likely I'd put even more towards principal each month!

On a $100,000 note at 5% the payment would be about $631 a month and at year 10 would be about $81,342 principal. 

Save the rent money and increase your cash holdings while paying down the principal.

I received my principal back in June, and held $100k note in the property which was paid back to me on October 19, 2018 (a year and two days after purchase). 

Run a simulation of a 30 year mortgage amortization schedule: the first several years are almost ALL interest, taxes, insurance, etc... with very little principal pay-down.