I want to take things into my own hands and educate myself before I pay thousands of dollars to smart lawyers who use great marketing for themselfs...And also : Can anyone recommend any other lawfirm then anderson just for comparison purposes?

You have a good core list but they are slightly out of sequence.

DSCR is what a bank would calculate so I'm unsure if the bank would use CapEx and a property manager in their calculations.I want to make sure I'm using apples-to-apples comparisons.

So it is almost never an apples-to-apples comparison. 

Affordability in Specific Areas: In comparison to other large cities, several neighbourhoods in Phoenix provide reasonably priced homes.

Most will take the sales comparison approach for value . 70-75% can get .

While the added bathroom is possible, it’s a lot of cash up front and comes with some hefty risks and unknowns in comparison to the ease and appreciation possible with only adding a bedroom.

Quote from @Christian Hutchinson: This would be like telling a hotel you can't have interior cameras in their hallways to to their individual rooms.Horrible comparison.

Efrem, there are many sites and comparison charts online to do this:  Metal vs Shingle roof? 

Is there any sq ft or other basis for comparison that you use?