In particular: "Realtor Only" or "Agent to Agent" Remarks - typically a freeform text field where agents can share details and amplifying information that they do not want to share directly with the public, and Attachments - It's pretty common for most due diligence information (seller's disclosures, surveys, rent rolls, operating statements, proformas, etc) to be included as MLS attachments.

Its pretty common, as many sellers do this so they don't disturb the tenants..  

Should pay you up front and at time of exercise if done properly.Both of these strategies are extremely uncommon in most markets these days so you should have plenty of time to research LOAs while you hunt for one. 

The reality is that:1) insurance is your primary line of defence2) You would need to be extremely irresponsible to warrant a suite (or make yourself a target).3) lawyers can/will pierce the vail of a LLC  

From there, taxes are paid with your mortgage and kept in escrow until due.Is it common to waive the escrow amount if you're putting down 20-25%?

50/50 is common and keeps people happy from my experience

For instance, if the current owner is paying the water bill and the MFH property is submetered, maybe it makes sense to put the water bill back on the tenants (except for the common areas).

I have heard several investors say that they only get one out of every 95-100 offers they make accepted, I dunno how accurate that is for your area, its a little extreme for my area, but good deals will likely be hard to come by. 

Not sure how common this is or whatever as this is my first actual deal, but it is possible it appears.

Erin Royster so wholesaling raw land to a developer is going to be extremely tough.