Anything more can complicate things considerably. 

Rent is not construed as being applied toward the down payment - that would constitute an equitable interest and cause complications.

It can get very complicated but doesn't have to be for 90% of the houses.

@Kamil Smith - Again, the scenario is sufficiently complicated that all paperwork is needed to give any meaningful answer either way.

So I have been doing a lot of reading and have discovered this industry is financially complicated.  

I found the textbook material to be very heavy and complicating, and I was wondering if it is worth the time and effort to get familiar with the calculations and problem sets used in this textbook? 

A little more complicated than the first but here is how it went. 

why complicate what is really a pretty simple thing IE owning RE... just put it in your LLC and buy proper insurance...

How complicated is it?

However, the practical reality is that a note transaction is quite complicated and has several constituent parts:1.