<i>Actually maintenance and repair can be modelled fairly easily (and as I found out I over modelled it) I used $5&#x2F;sqft&#x2F;year as a maintenance cost.</i><p>The parent was talking about the volatility of maintenance costs, not the average.  Just like people in different situations need to adjust their investments to achieve the right amount of volatility, for some people it probably makes sense to shield themselves from the possibility of unplanned maintenance costs.<p>I have no clue how volatile maintenance costs are, but I don&#x27;t think you addressed it in your reply.