Contact your county tax assessor's office to learn how to find this information (it's usually online and easy).Talk to the neighbors.There are paid apps that may include contact information for specific properties.

Are you giving them the promise to use them in future deals where they will earn 3%?

But frankly we have other opportunities to make money online in 2024 that did not exist back then.

Every city is different, PLEASE get yourself to a RE meeting, and do NOT try and do all this from books and sitting online, it will not end well. 

You can do some sourcing yourself through Facebook groups, and online RE communities , and even pick up the phone and cold call some homeowners that may be tired landlords, don't owe anything, and have built up some equity.With enough volume, you should come across some solid deals.  

You can find templates for joint venture agreements on BiggerPockets or other real estate investment websites.Next, consider joining local real estate meetups or online groups where you can network with other investors.

Compounding interest will far out earn for you what you could be saving by paying off your mortgage quickly.

I see this a lot, and I think there's been so many bad projection tools on the market that the "what did this house earn" is a valid question.For investment properties there is a true number and buyers want to know how that compares to the projections. 

Quote from @Emma Johnson: Yes I checked It is listed as an option on their website everything online looks legit.

You might be able to find a lot of this info online, on YouTube, here, etc and piece it together however as a busy professional I didn't have the time personally to try and fail - nothing wrong about choosing that path however I knew I didn't have time and I was in peace with hiring a coach to help me through my first deal, 8k is affordable in comparison with the 30,40,50k programs out there.