Besides what is required by law to be done by a  licensed professional.

Not that I want to, but I do feel like I'll have to sometimes, and it's good to hear that I need to remind myself I can't, so I can be professional.  

I' be interested to hear what professional photographers you have used in the past as well.

I think it can be invaluable to make a personal connection with lending professionals because they are then able to help sell you to underwriting.

With the exception of skiing.Places like SF and NYC definitely win when factoring in motivated/interesting people per capita though :P  I tried really hard to not like it, but my 5 years here have been a blast, both personally and professionally.

I always meet some good professional contacts (contractors, Agents, lenders) that are investor friendly, as well as tons of experienced and newbie investors.

Also, make sure that it is written by a professional in the field. 

To get top dollar show when it's done, has staging and professional pictures.

You could always check with your tax professional to be sure, but I can't see why you'd need to issue a 1099 to the property owner in this case. 

Arrange for professional cleaning of the HVAC system, ducts, carpets, walls, woodwork, cabinets, windows, blinds, appliances, etc.