He set me up with an automated listing service that I can customize with keywords to find undervalued and distressed homes in my market.

Some of the reports are a short tax assessment and others with a much more detailed description of property, several years of sale history, tax appraisal history, sketches of square footage, road conditions, a current picture, owner history, and comments made by last assessor.

I’ve already taken pictures of the units now.

I don't think it should be a problem but I hope he isn't a pain in the butt and doesn't interfere too much with the negotiating or me taking pictures or whatnot.

The wholesaler also claims to have many deals and had emailed me pictures and info about the property, but no addresses provided.

That being said, I have associates that building duplexes (picture below) in certain neighborhoods and land clearing being done by builders like Lennar and Mattamy Homes. 

When I did my first property, I took lots of pictures and a ton of notes. 

Can you post a picture of the house?

Furthermore, you also have to take your risk tolerance into picture.

They allow you to provide them with custom field criteria (i.e absentee owners, 50%+ equity, owned for 5 years +, 2-4 units) then charge you a small price per contact.