I think discounting gross rents by 50% is pretty standard.

Converting the vacant/gutted 14th unit into laundry and storage facility.

I believe the syndications would be standard multi family and industrial investments that provide a K-1.

I think the standard go-to is two large beds which would work primarily for 2 couples but also work for families in a pinch.In one of our 2br/1ba cabins I noticed there were a lot of 2br/2ba cabins nearby with 2 large beds and I figured since I'd be at a disadvantage against them renting to couples (since they have the extra bathroom which is huge in that scenario) I decided to focus on families and put a twin over full bunk in the 2nd bedroom (along with an xbox). 

That other 30% is what you need to get financing and it is an industry standard safety margin for a flip.  

What are some industry standards that I can apply to these areas when evaluating properties?

It logistically makes the most sense with where we're at, and I factored in standard PM costs when I analyzed this deal. 

Is that standard?

If you have four approved applications on one rental in that short a period of time, I would argue you need to raise your standards or your rent.

Most of the time LRO will fall into the "Standard Market" meaning you are going to get a competitive price and comprehensive coverages no matter where you are, generally speaking.