I can walk you through the pros and cons.

Thank you so much for commenting and allowing me see a walking version of my future dreams!

So If I sold at $1,000,000 walked away with $500,000 but only exchange to $900k in property and reinvest the entire $500k?

 That’s definitely a tight rope to walk.

What do you tell the tenants when the real owners walk in to their house?

What I am getting at is you are more likely to hit your target--if you can describe it more exactly.A good book to read that will help you figure things out more precisely is "Awaken the Giant Within" by Tony Robbins.If you read it and do the written questions, it will walk you through the steps to come up with a more specific goal than just "Looking to get into Real Estate".Then once you know a little more about what you want to do--there can be a lot of help in here for you.Another good book to read is "Rich Dad Poor Dad".Good Luck!

Can anybody provide some insight on how to legally convert this into an ADU or Duplex with it's own address or recommend an ADU professional to walk through the process?

My plan is to walk around a popular area for older multifamily homes.

I don't recommend cash because it's a large amount to walk around with.

@Sam Alkattan it would be easier if you call my husband to walk you through the pros and cons.