The low total interest I'm paying each year combined with my curiosity to personally see the interest adjustment play out on a low principle balance changed my thinking.With a small remaining balance, the difference between the two approaches (maximize leverage v minimize debt) is too small to worry about.

I doubt if we have the hardness you recorded but yearly preventative maintenance of any system is imperative to longevity.Given the precarious attic location I would definitely review the obvious advantages of an on-demand system.I have also designed a simple fix for the 'cold water sandwiching' issue that plagues the on-demand systems with feed water temperature fluctuations common in colder climates. 

If so, wouldn't it be better to use some type of adjusted number as (hopefully) a property does not turn over ever year? 

I just finished negotiating the sale of one of our single family rentals and got me wondering if anyone has anything unusual they like to throw out in a counter offer to "sweeten" the deal without just lowering the price or adjusting closing costs.

I have been looking at the investment properties on their website and have been using my own adjustments to the numbers provided to see what the monthly cash flow would look like.

I've seen to many people try to DIY plumbing and get burned a few weeks later when they forgot to do something like re-wrap the pipes in cold climates...

Perhaps that will change some day, and I'll want to spend all my efforts hunting for new deals, and will hire out all my work, and that's ok--I'll adjust when the time comes, but for now...I want to get my hands dirty. 

Most of the time attorneys are completely aware of this and make the necessary adjustments on the closing statements.

My story sounds similar to yours, except that I did mine in the cold climate, the Winter Park, CO area.

An appraiser is not generally going to make an adjustment for that duplex down the street that sold.