That's what is great about real estate. You can do it and have no debt at all. it is going to be a hell of a lot of work.
1, Move to Cleveland, Detroit, Flint, Birmingham, Memphis, wherever
2. Buy for cash the cheapest SFR houses you can that you, by working your butt off can make rentable for all in 15k each.
3, Rent house out possibly even on section 8
4, Repeat 8 times
5, Self manage to save money
6, Live in the 8th home
7, With no debt you should be able to net 428.00 after taxes giving you 3000.00 per month
It's doable but remember YOU would have to be there to make the cap ex affordable and look after everything. plumbing, roofing, cleanouts, EVERYTHING.
I posted this to demonstrate that its all in how the question is worded. can it be done? heck yes, will you do it this way? probably not, is it sustainable? Unlikely.
Don't misunderstand this as a recommendation, it takes special people to deal with these properties. I was just demonstrating that darn near anything can be done, with sacrifices and hard work.