A comment earlier is correct that the 90 degree bends decreases the amount you can run.For example if a dryer allows a length of 40', deduct 10' for each 90 degree bend and that is the total run you can have

But how do I account for the decreasing total mortgage?

Most people forget to treat this like any other business and you aim to decrease expenses while increasing the return and that was effective and in the pic looks great.

However, if your return on cash is decreasing as you add homes then the math gets a little more complicated.  

You will need a trusted team.I also mostly agree with the sentiment of @Gustavo Munoz Castro as I believe the rent will not cover the cap expenses on most long term rental units in Mexico even with a huge labor cost decrease. 

This bank does it: https://www.ncb.coophttp://www.brickunderground.com/blog/2014/08/cash_...Also, just because there is a neat product to unlock some capital from your personal residence, don't dismiss the power of focusing on paying down the personal debt head on. decreasing the equity in your residence may also make it more difficult for you to sell in future if the market goes down, depending on how low and long ago you purchased.

This is a timely move with interest rates rising, RE values will decrease.

Also, decreasing your spending rate is much more powerful than increasing income, which is something that I didn't fundamentally understand until reading the article.

Just today, Green Street Advisers is warning about a deadly combination that may hit some rental markets soon - accelerating supply and decreasing demand, as the Millennials age out of renting and the following generation is much smaller in number.All of this militates for a very conservative approach to investing in apartments - exactly the opposite tack being taken by investors out there  "making" deals work.

How can you determine the amount to increase or decrease for different features that differ from the subject property?