There's a reason that people try to buy properties off-market and that is because you can find sellers who care more about terms than maximizing returns.So start with a conversation: you already presumably have some rapport since it's your landlord and you've spoken before.

Here’s our OPINION for the Metro Detroit market (use as a template for your target area!)

Find someone who's doing what it is you want to do in the market you want to do it in and bring them value to learn.

It requires no money upfront, so you will join thousands of others trying to do the same in your market.

Look at their marketing strategy.

I still am on the lists of all the major wholesalers and still show up to showings occasionally on properties that might have enough margin for me but have not purchased recently from a wholesaler.Just like Adrien says, they provide a service of marketing and negotiating contracts for you.

Firstly I apologize that I do not have any market insights data specifically, but Houston has been a rough market as valuations have pulled back.

Quote from @Blake Steagall: Hello @Jaycee Greene, I do not own any real estate in that market yet but am interested.  

Over the years the only place I have lost money is the stock market.

Few agents in the market understand seller finance and the many ways it can be structured, and few will sometimes promote it, but the rest are just risk averse.