This barely scratches the surface, but hopefully it puts you on the right track.

I don't expect problems here.Plumbing--Also don't expect problems here.Elevator--No experience, so will get this checked.Landscape/irrigation/parking ingress/egress issuesGlass and exterior facadesAll interior surfaces and fixturesSecurity issuesInternet/phone access Examine all suites, common areas, and service areas, all I can see, smell, touch, etc.Anything else on physical due diligence?

Better drainage?

Might be a value add in the rehab when the jobs surface.

I have a FHA transaction right now where the FHA appraiser demanded the foundation be inspected and the drainage around the property be upgraded prior to close.

Just like anything else do your due diligence on multiple lenders and retrieve what they have to offer before running your credit.I'm not sure if I even scratched the surface but I hope this helps a little.Just my two pesos. 

Maybe it is work you are actually doing or you are hiring out but either way the same couple things end up more than they really should be.For instance, you can predict carpet costs well but half the time the tile guy runs over due to discovering extra surface prep is required.

Providence on the other hand offers a little better ROI due to extremely low prices, but is known to be not tax friendly and, on the surface, doesn't seem to have much growth potential.  

there are a lot more but that is just scratching the surface.

Then stormwater drainage report.