@Caleb Reits My experience is that for everyone involved you need to have as much accurate information as possible. I have done a few of these size deals. Serious buyers don't want to waste their time. Treat it like a job because you'll need to sell it several times. To the buyer, inspector, and appraiser. Buyers buying these are expecting a discount in most cases because they are taking some crappy properties but also getting some decent or even nice ones. I always make sure to do the following to present to potential buyers.
1. Addresses with lease start and end date and rent amount
2. Unit size (bed, bath, Sq/ft) (Notes tab for useful things such as new roof etc)
3. Ideally trailing 12 months P/L's
Buyer is likely getting commercial financing so having all the financial stuff up front just helps cut to a yes/no decision... Or at least see if they want to invest the time based on the numbers provided.
As far as marketing that is tough I am not a fan of blasting stuff out there but you have to do what you have to do. In most cases deals like this in my experience sellers want a buyer who can close and they are working with you because they think you can deliver that as well as help them get a certain price.
I am happy to chat if you want to give me a ring I will be around!