During a google search I came across macerating toilets and Saniflo systems.

Now the sellers son has decided to stay and squat at the property for another month til the end of September, with the exception all of the escrow security funds coming back to me (buyer), am I entitled to split or give up any of the escrow funds with the sellers son due to him squatting in my new property.

Whats the condition of ventilation, exterior, toilet seal, walls, floors?

I never had to take leaky toilet maintenance calls. :) 

Which toilet is the best for water efficiency and how expensive is it to install a toilet with a flushometer?

The subfloor was rotten all around the toilet and it was held up by the pipe!  

I would be terribly upset......where is my half toilet?!

Toilet is $125, make the switch.

This evil bastard has a faulty moral compass and has decided to steal from the "rich" (you) and give to the "poor" (himself) by squatting on the premises under the guise of a non-existent or forged lease.Where I in your position, I'd find a FLAT RATE eviction attorney that has experience with these kinds of cases as soon as humanly possible.

It feels like I'm stuck in some sort of limbo between "I want to make a lot of money" and "I really want to help a lot of people.On one hand, there sits a burning desire to help people, which has been a part of my personality for a long time.On the other hand squats a selfish guilt in wanting to make a large amount of money.