Now I realized that I had given them a long free ride and  I must do a new lease factoring how large the family have increased.

@Ryan Agustin For conventional financing assets and income and DTI's are the important factor. 

You didn't say how long you think you'll own the home, that should be factored in.

What 'ugly' factor can you accept in exchange for the great price?  

Remember when looking at value you need to look at all the factors involved - including the neighbors.  

Good Morning,I need some insight and recommendations as to a situation that has come up, ina  property I am looking to purchase, that has Exposed wiring , all throughout the house.The house was built around 1955 , and it is all wood on the inside ( almost like a Log cabin on the interior walls ), in that there is no sheetrock anywhere in the house.Well, all of the wiring that goes to the.... light switches, Outlets and ceiling fans, are all " Exposed " and are tacked to the wall with staples.Here is my main question please.....

What kind of extra expenses does everyone take into account for the additional units, are there any economies of scale, how do your factors change?

I fully understand leveraging and the multitude of other factors that go into real estate investing and creating an ability to scale, but I also do not like the thought of emptying the back account to try and acquire a property.

You can use cash as a negotiating factor to get the price down along with coming up on your closing date. 

Don't forget to factor that in.