I've heard hunting down the owner of abandonded property can produce some of the most lucrative deals.

Some or all of those would produce the net result of a greater "bath" that could then offset certain gains.  

I'd like to diversify my income stream, and am looking for income producing properties.

Are you sure an actual meeting took place where minutes would've been produced?

After 30 plus years as an real estate entrepreneur, investor, landlord, etc, my energies are now focused on apartment complexes/buildings, income producing multi-units and commercial property. 

I am ultimately looking to buy & hold some rental properties to produce an income stream when I am retired (and hopefully to help fund an early retirement).  

just call the title companies.. normally customer service is slanted to top producers.. but sometime new accounts can break through... remember the title companies pay salaries so they cant spend a ton of time on someone who closes one deal in 6 months.

Also in terms of financing an income producing property where I plan to use it as a primary residence, who do I want to borrow money from?

I would invest in Crowdfunding, Partnering providing funding and to add to your list, Tax Liens.I think these areas are less demanding of your time and they allow flexibility, as an investor.Learn, Apply, Produce!

One of the best tips I ever heard: spend as little time as possible on things that don't produce income.