So far this has produced great results for me.

Heating costs go up in winter, as does electricity due to the reduced natural light and more people indoors.

$400k equity is producing $1600/month cash flow for a return from the cash flow of 4.8%.  

Haha, not sure about the veracity of some of those comments, but I tend to be skeptical by nature anyway.

,We discovered over the course of this discussion that more smaller extra payments produces less benefit than fewer, larger "chunks". 

With an extra vacancy or a maintenance issue or an extra turnover, this is definitely a negative cash flow producing investment.So when you say the rent growth and value growth have exceeded your expectations, I would love to have you respond as to how that is possibly the case. 

If there is any kind of damage to the house because of a natural cause if you approach the insurance company without a landlord's insurance they will outright deny your claim.If you have a mortgage the bank will insist that you have landlord insuranceTenant has renter's insurance.

Natural fit.

Brook and all the miles of nature trails on Shades Creek walking trails .  

You need to understand how to drive the Net Operating Income to produce a good solid return.