I've learned a lot about buying / renting out a duplex and hopefully one day owning a large rental properties, so I know this is how I want to invest my money to ensure that a passive income stream is coming back to my family from real estate but I don't actually know how to make my first duplex purchase.

You can also get great financing as an owner user medical practice as banks love it and best part when you retire you can sell your practice to someone and require them to lease from you for 20 years so you have a stream of income down the road after you leave the field. 

The pros for me were being able to have a good revenue stream while I worked to build my personal investing business (which is my real passion).

Look boys and girls.. again... you see what you want to see...The numbers donotlie.I can keep posting my daily leads streaming in,.. and these are high quality hot leads where people beg me to come buy their house pretty please.For "free"!

This place is hub of experts so you are at right place

I want to build up multiple cash flow streams by sending a lot of money to investment accounts.

It's one of those things that, like the shrunken head said in "Harry Potter and The Prisoner of Azkaban" (about the pea soup at The Leaky Caldron), "Make sure you eat it before it eats you".As I understand your post, you're complaining about free advertising which is working for you: steady stream of calls coming in.That said, of course, the poster could have just fat-fingered the number and posted yours instead of someone else's - or did they call out you or your company by name?

if he is sick would they like to keep an income stream by owner financing?

Most of my peers, including myself exchange time for money through hourly wage, getting into passive revenue streams is contrary to prevailing thinking which limits brainstorming opportunities. 

Each apartment I own is a biz in of itself and the pm company (now a vertically integrated asset/property/construction management firm) is 80 employees strong with 200 million in assets under management.My passive/cash flow streams wouldn't be anywhere close to where they are today without first focusing on business income.All the best on your journey!