I submitted a low-ball offer and it got rejected.

Print them off, study them, highlight them, make notes, read some blog posts, and understand the subject.The second document he links includes precise definitions and a guide for landlords to use for screening support animals.

I work primarily with investors and offers that are significantly low (I mean really low ball) come from wholesale investors using the Jerry Norton system.  

Meanwhile, their mom wants to list a house and their friend wants to buy a house at the same time (taking their eye of the ball).

Crystal Ball.

My crystal ball tells me that if all goes well, we should see stabilization of rents and sales prices somewhere between March – October.

Crystal Ball??? 

Study appraisal techniques and valuation methods.I like to say you need a crystal ball of sorts, need to look at the history of the note, payments made, see where and why the note was created, understand the borrowers position, look at their ability to pay and find out as much as you can about the borrower, getting in their head so to speak.

Some of your questions require a crystal ball and will keep you out of every investment forever. 

They're close enough together that you'll have trouble separating root balls on each plant.