How much does the current portfolio generate?

Most of the time they are quite knowledgable.

Which will also depend on the neighborhood.You want to, "rehab/maintain to the Neighborhood".Most investors go overboard on their first rehab and waste a decent amount of money.

Ask to speak with some of their current owners and current/former tenants.

Prices are currently high, so we’re looking to educate ourselves on how to find a good deal.

You left out the most important number. 

Ask to speak with some of their current owners and current/former tenants.

Talk to all of them and see which ones you like, fly to town and meet them, look at some examples and numbers on current deals. 

Most likely I can pocket 50% of the rent for paid off property.  

@Chris Morris have ALWAYS seen bad "deals" from rookie wholesalers that really don't understand what they are doing to provide value to the industry.It's getting worse because the real estate market has recovered from the 2010 Crash, yet many are still using tactics & methods developed during this time.Everyone in the industry needs to go back and look at what was being done BEFORE 2010 and start using those methods, updating them with current technology.